Skip to main content

FAQs – Choose a subject below

Building & Construction 

These questions and answers will help you with what you will need to know about constructing a pond or water feature, as well as what to look for before the building stage begins.

Click Here


A correctly specified filtration system will help keep your pond clean and clear, aid in fish health as well as oxygenates water; these FAQs will help you with your filtration decisions.

Click Here

Fish and Plants

Questions and answers on knowing which fish and how many fish to keep in your pond, as well as how to maintain your fish and plants and to keep them safe from predators.

Click Here

General Maintenance

Learn how to look after your pond with general maintenance and what to do when or if problems occur.

Click Here


Questions and answers on which lights to use how to use, them and what is the best way to help beautify your pond or water feature.

Click Here


FAQs on pumps, tips & tricks on which pump is suitable for yourneeds and which pump to use where.

Click Here

Water Treatments

Questions and answers on which water treatment is best for which problem and how to solve and fix pond algae problems and cloudy water.

Click Here

Building & Construction

Can I build my pond out of concrete?

Yes, concrete may be used but it still needs to be sealed to prevent lime leaching into the pond and negatively affecting the water chemistry. Clearpond Pondseal is ideal for this purpose and only comes in. Concrete moves over time and concrete ponds tend to crack and require regular maintenance. Pond liner is usually a better option.

Can I get different coloured pond liner?

Pond liners usually come only in black because black hides algae, helping your pond look healthy & clean. Black also gives a better background to show up the colours of your fish – except for the black ones!

Can I join pond liner?

Yes, watertight joining of liner is possible. It’s a great idea to do all joining on a flat surface, as your pond may not be so flat. Try joining your liner on the drive way and then move your liner into place. PVC liner can be joined using PVC liner glue and Proliner EPDM can be joined using Quick Primer and double sided tape.

Can my pond be above ground level?

Yes, but remember to take the weight of the water into consideration when looking at construction alternatives. Treated sleepers or bricks are popular choices and pond liner can be used on the inside to provide low maintenance water holding.

Do I need to fence my new pond?

It depends on your individual circumstances and council regulations. You will need to check your local council requirements before making that decision.

Do I need to put anything under my pond liner?

Yes, it is better to protect your liner from damage caused by stones or tree roots. This can be done by sand but we recommend using pond underlay because it is easier to use and provides protection to vertical walls, where sand cannot.

How can I build a rock waterfall on pond liner?

Preparation for a waterfall to be built on top of liner should be made before laying pond underlay. A concrete slab, larger than the base of the waterfall should be laid, leveled & cured. This provides support to the weight of the materials used to construct the waterfall. When you do start building, take some liner off-cuts and place them under any rocks that are being placed directly onto the liner. This will provide extra layers of protection. Try dry stacking your rocks until above water level and then cement waterfall rocks into place as concrete and cement leach lime and other toxins into the water poisoning fish and plant life. If this is not practical then seal cement using Clearpond Pondshield.

How do I get power leads into my pond?

The safest, easiest and most reliable way of getting leads and pipe into and out of a pond is with purpose build flange fittings such as the Oase Tradux. The Tradux enables you to pass hose or electrical cables through a pond wall below water level without cutting the plug. Whatever method used, you should follow all regulations regarding electrical power cables or if unsure, contact a certified electrician. The length of the cable of any products used for the pond such as pumps and lighting should not be altered. Please contact your supplier before cutting any plugs or cords.

How much liner do I need?

After you have dug or built your pond base, use a piece of string or your garden hose to measure the width and length of the liner you require. Be sure to follow the pond contours and allow a little extra (250-500mm) around the sides to be used when creating your edge. It’s best to dig your hole before buying liner as things could change when you start excavating.

Is it an issue if I build under existing trees?

Yes, you will need to use pond underlay to protect liner from root damage. You also may wish to add a leaf skimmer to the filtration system to prevent the falling leaves breaking down within the pond, creating excess organic nutrients that will result in algal blooms.

I've got some leftover builders plastic, can I use this to build a pond?

No. Builder’s plastic is not fish friendly but more importantly it’s not UV stable which means that it will break down in the sun and cause major problems. It is not suitable for constructing ponds.

Should I cover the liner with pebbles?

Aesthetically they can enhance the look of a creek or pond, biologically they add surface area for bacteria but they do increase maintenance. Rocks will trap debris and prevent it from travelling into your solids pump and on to your filter. This trapped organic material can provide nutrients and result in algal blooms. Organic matter can be reduced using pond vacuums or water treatments such as Clearpond Pondzyme. Using rocks comes down to personal preference but if you decide to use them then go for larger rocks rather than aquarium style pea gravel as larger rocks will enable better water flow and are easier to vacuum.

What is the best building material for my pond?

Ponds are generally constructed from a variety of different building material: PVC or EPDM liner, Concrete, Fiberglass and Plastic preformed ponds. There are advantages and disadvantages in using any of these items such as cost, availability and suitability to your own pond, so it is worthwhile talking to your local dealer to see which one is suited to your own personal requirements.

What should I consider when buying liner?

Never buy your liner before you have dug or built your pond base (this will prevent shortfalls or excess). You should also consider if you will need to join two pieces of liner, if so, you will need to purchase the relevant joining products.

What size pond should I build?

When it comes to size, you are only limited by your imagination. The bigger the better as larger ponds are easier to stabilise and maintain. Shallow ponds heat up and can lead to algae problems; a minimum depth of 300mm is fine unless you plan on keeping koi. Koi prefer deeper ponds of around 1m. You should always check with your local council to see if there are any regulations governing the size or depth of your pond.

What thickness of liner do I need?

Most backyard ponds can be constructed using PVC or Proliner EPDM. If you intend to place large or heavy objects on top of liner, or are planning a very large pond then the thicker Proliner Series 100 liner may be required. Remember the thicker the liner the more expensive and heavier it is. Proliner Series 70 is our most popular liner because it offers the flexibility of a rubber liner while not being as heavy as thicker liners. This mix of flexibility and weight is perfect for the average back yard pond.

Where should my pond be situated?

If your pond is to have water lilies, Irises and other aquatic and semi-aquatic plants in it, it is wise to choose a place where the pond will receive 6-8 hours of full sun per day. Getting started: before the first sod of earth has been turned, contact your local town or shire council to find out if there are any restrictions in setting up a pond such as, if fencing is required. When putting in a pond it is best not to place it under or near large trees, it is also wise not to place a pond under deciduous or poisonous plants or trees, as leaf litter, toxins can all kill fish & plants and roots can puncture a liner or crack concrete.

Why is pond liner underlay preferred over sand?

Sticks and roots can still penetrate sand but will be held up by the fibrous weave of a fleece. It is also easier to work up pond walls with an underlay, while sand will not hold to steep walls.


Can I make a filter myself?

It is possible to make your own biological filter and we have high quality filter media such as Biomatt for this very purpose. When making your own filter consider the overall cost and extra time it will take to clean. If your time is valuable you’ll be better off buying a filter that’s had all the design work and low maintenance features built in.

Can I use my old swimming pool filter?

No. Swimming pool filters are not suitable for ponds. Pool filters are mechanical filters that are designed to catch small particles in the water. They do not perform biological filtration and are therefore not suitable in ponds. A pond filter will mechanically remove particles in the same way but also remove toxic waste through biological filtration.

Do I leave my filter on if I go away on holiday?

Yes but check to see if it needs a clean before you go. Although if going away for an extended period please ask a friend, relative or pond maintenance specialist to check on the whole pond as well as the filter.

Do I need a filter?

If you want clean healthy water yes! You may know someone that tells you their pond is crystal clear and they don’t have a filter but what they’re not telling you is that they’re regularly emptying and scrubbing their pond. A good working filter means you save water by not having to empty your pond and lets you have a good healthy environment for your fish. You wouldn’t let your dog or cat live in their own waste so why do it to your fish?

Do I need a special pump?

You should use a filtration pump such as the Oase Aquamax. These pumps are called solids handling pumps as they can remove solid waste out of the pond and put it into the filter. Pumps that have sponge filters can be used on filtration systems but are not recommended as they don’t allow the solid waste to enter the filter.

Do I need an electrician to install my UV light?

No, they plug into a normal weatherproof power point.

Do I need power for my filter?

Only if you’re using a filter with a UV light.

Do I need to change the bulb?

Yes, most UV bulbs have an operating life of around 12 months so you should change them each year. The bulbs will still be shining after this time but they will have no UV effectively and will therefore not be controlling algae.

Do I need to clean it?

Yes, if the light is reduced by a build up of dirt or calcification then the UV rays won’t be able to penetrate the algae so ask your retailer how to clean it when you purchase. High quality lights such as the Oase Bitron range are self cleaning.

Does the amount of fish make a difference to the type of filter I need?

Yes, the amount of fish in your pond will make a big difference to the size and type of filter you require. The more fish you keep the larger the filter you require. Always let your retailer know how many fish you have in your pond when selecting a filter.

How do I clean my filter?

High quality Oase filters let you clean the filter without getting your hands wet but from time to time you’ll need to give them a more thorough clean. You’ll need to turn off your pump then open your filter and take out the media. The filter media should be cleaned with pond water or rain water only as the chlorine in tap water will kill much of the beneficial bacteria. Never use cleaning agents or bleach because this will kill your bacteria and then your fish when you turn your system back on. Ask your retailer how to clean your filter before you purchase it.

How do I know its working?

Depending on the model, there will be an indicator window or clear hose tail through which you can see the light. Ask your retailer how to check it when you purchase.

How does a pond filter work?

Biological filtration performs a process known as the nitrogen cycle. In this cycle organic pollutants that enter the pond via fish waste, decomposed plant matter or excess fish food are converted from toxic to non-toxic substances using oxygen and bacteria. If the harmful substances are not broken down by oxygen and bacteria then algae is encourage to grow and fish kills can occur. The process is the same that occurs in aquariums, just on a larger scale.

How does my filter move the water?

It doesn’t, you need a pump to do this. A pump moves water and filter cleans it, you need both to get clean water.

How long will my filter pads last?

Every pond is different and this will depend on your individual circumstance, although generally, you should get at least two years out of your filter sponges and replacements are available.

How many hours a day does my filter have to run?

A biological filter must run 24/7 to sustain the bacteria and oxygenate the water. This is why pond pumps with low power consumption such as the Oase Aquamax are recommended for filtration systems.

How many hours a day should I run my UV light?

24/7. It should not be turned off as it will give the algae a chance to multiply.

How often do I have to clean my filter?

Every pond is different so there is no easy answer to this question. As a general rule you should clean your pump and check your filter when you notice a reduction in water flow on the outlet side of the filter. High quality filtration systems such as the Oase Biotec, Filtoclear or Clearpond Clarity will have inbuilt mechanisms that will tell you when it’s time to clean them.

I want Koi in my pond, does this make a difference to the filter I need?

Yes, Koi are a beautiful fish that can grow to a large size but also produce a lot more waste than other fish species. Koi ponds require high amounts of oxygen and larger filtration systems so please tell your retailer if you have Koi in your pond.

I’ve got long stringy algae in my pond, what can I do?

You must expect a small amount of algae in a pond because it’s a natural system but if you experience problems caused by excessive string algae or blanket weed then you should consider reducing the amount of feed and ensuring you have a good biological filter that operates 24hrs a day to help remove excess nutrients from the pond. String algae prefers water with high pH so testing your water and reducing your pH with Clearpond pH down or Oase pH minus will also help. Oase Aquahumin will also help with String Algae by naturally reducing the pH of the water and changing the water to conditions unfavourable for string algae. String algae can also be controlled electronically by the Clearpond Algaeguard.

If I have a UV light do I need a filter?

Yes, a UV light does not perform any biological filtration and will not stop the build up of toxic substances in the way a biological filter will. The filter will also catch the dead algae that would otherwise turn into sludge at the bottom of the pond.

Is a Pump and Filter essential?

Before a hole is dug and you have an idea or the size & type of pond you need. It is feasible to ask your local dealer on the cost of items such as pumps, liners, ponds and filters etc. This will help to save on any cost blowouts once the pond is setup. Ponds without fish stock require the water volume to be turned over a minimum of once every 8 hours, low fish stock require a minimum of once every 4 hours and large fish stock such as Koi, a minimum of once every 2 hours. And to get the correct advice and equipment from the start. For successful fish keeping, a pump and biological filter are essential. A good filter system will give you clear water, aids in keeping fish healthy, aerates and oxygenates water, circulates would be stagnant water and most importantly saves you time. Although many people have said they have never had a pump or filter, they are often cleaning out their entire pond and replacing dead fish on a regular basis. As with most projects, you will forever enjoy something that is setup correctly the first time.

Is the bacteria in my filter harmful?

Not at all, it is a natural bacteria that occurs in all natural water systems.

I've got a UV but my pond is turning green, why?

Your bulb could have blown, it could be dirty or it could need replacing. Check to see that it’s clean and working, make sure it’s not more than 12 months old and keep it on 24/7. If you’re still having problems see your retailer for further advice.

I've seen filters that look like Oase filters, are these OK?

Oase filters are so good that low quality manufacturers are trying to imitate them. Whilst these filters may look similar they are not made with the same high quality materials nor have the scientific designs. Filters are used for a purpose and just because a filter looks the same doesn’t mean it will do the same job of keeping your pond clean. While a cheaper imitation may be tempting to buy stop and think about the cost of replacing it when it doesn’t work. Always buy the best filter you can afford, your whole pond depends on it.

My bulb has blown, can I get a replacement under warranty?

No, light bulbs are not covered under warranty due to factors outside of the manufacturers control such as power surges and lightening strikes.

My pond is already constructed and I've got nowhere to put a filter. What can I do?

Speak to your local Oase dealer and provide them with a full description of your set up. They will then seek our help if required.

The box in the shop says the filter will do a large pond but the filter itself is small, is that right?

Most filtration systems that are available in Australia & New Zealand are manufactured in Europe and the recommendations on the packaging are for European conditions. We have different environmental conditions and therefore most ratings found on filtration packaging will not hold true in our climate. You should always beware of claims made on filtration packaging and ask your retailer if unsure. The good news is that all Oase filters are tested in Singapore and our Clearpond filters are tested in Australia so our ratings hold true.

What is a gravity filter?

A gravity filter sits outside of the pond and is fed water by a pump where it enters the filter and flows through the filter media under gravity and returns to the pond. These filters must be positioned slightly higher than water level to enable its return under gravity. Gravity filters are the most efficient and effective because they have a larger amount of filter media and higher oxygen availability for bacteria than other styles. Gravity filters are suitable for all size ponds. Oase Biotec and Clearpond Biosteps are examples of gravity filters.

What is a pressurised filter?

A pressurised filter sits outside of the pond and is fed water by a pump where it enters the filter and flows through the filter media under pressure so can therefore be positioned above or below the pond. Pressure filters must never be run with swimming pool or irrigation ‘sump pumps’ as these pump pressures are too high and will cause the filters to burst. Pressurised filters are suitable for ponds with fish up to around 7000 litres or 15000 without. Oase Filtoclear and Clearpond Clarity are examples of pressure filters.

What is a skimmer filter?

A skimmer is designed to catch leaves before they fall to the pond floor where they break down and form an organic sludge that feeds algae. Skimmers can be attached to the suction side of a solids handling pump such as the Oase Aquamax or be built in to the side wall of the pond during construction. The Oase Filtoskim is a revolutionary product that contains pump, skimmer, biological filter and UV light in one easy to install box.

What is a UV light?

An Ultra Violet light (UV) is a light that emits ultra violet rays. They are used in ponds to control algae that turn water green. The algae that turns water green is microscopic and as it passes over the UV light it is killed and trapped in the filter.

What is an internal filter?

An internal filter sits inside the pond underwater. They are usually attached to the suction side of the pump and are not as efficient as other styles of filtration as they are relatively small and have low oxygen availability for bacteria. Internal filters are used in small ponds up to around 1000 litres. Clearpond foam filters and the Clearpond Internal Tray Filter are examples of internal filters.

What should I consider when buying a filter?

Where you can locate it; How often do you want to clean it; How easy it is to clean; The amount and type of fish you have; The size of your pond; Will it do what it claims on the box.

What type of filter do I need for my pond?

Pond filters are known as biological filters as they purify water through a biological process driven by bacteria. Biological filters convert toxic substances that pollute the water, feed algae and can harm your fish, into non-toxic substances through a natural process known as the nitrogen cycle. There are many types of biological filters but all need to be sized according to the size of your pond and the type and amount of fish you wish to keep. Further assistance and recommendations regarding biological filters can be obtained from our network of retailers found in the ‘where to buy’ section of this website.

What type of filtration is best?

It depends on your individual situation and the size of the pond. Each filter has its own advantages so make sure you give your retailer all your relevant information such as size of the pond, type and amount of fish, amount of sun exposure, amount of plants etc. The more information you provide, the easier it will be to get the right recommendation.

What's so special about Oase filters?

Oase filters have been scientifically designed and tested in partnership with German universities. They are backed up with a Clearwater money back guarantee when used in accordance with Oase’s recommendations.

When should I think about a filter?

When you’re planning your pond. If you think filtration when you’re planning and constructing your pond you’ll have more choices available to you. We see many cases where customers need a certain type of filter but can’t use it because they’ve already built their pond and there’s nowhere for it to go. Even if you don’t buy your filter right away at least plan for it in your construction so you can install one when required.

Why does my filter smell when I open the lid?

It smells because the bacteria is doing its job. A good working filter will produce nitrogen gas as one of its by-products which means it’s working well.

Why isn't the filter on my pump keeping my water clear?

The small sponge filters found on the front of some pumps are only designed to stop particles damaging the moving parts (impellor) of the pump. They are not designed, nor capable of cleaning water. If you have one of these filters and have to clean it more than you’d like, you should consider a Clearpond Internal Tray Filter which will dramatically reduce your maintenance.

Why should I be wary of cheap UV lights?

Cheap UV lights can have inferior bulbs with life cycles of 6 months or less. Some have even been made using non-UV stable plastics!

Will my UV light kill all the algae in my pond?

A UV light will kill all of the free floating algae in your pond that turns the water green but will not control algae on rocks or the sides of ponds as these are more highly evolved plant life and cannot be passed over the UV because they are not free floating.

Fish and Plants

Are cats and birds going to catch my fish?

In an outside pond your fish can be very vulnerable to predators. A minimum depth and some surface cover are all that is required to keep your fish safe. Bird/cat netting is available which stretches over the pond at surface level that can be used in more difficult situations. It is fastened around the edges of the pond with stakes or tent pegs, and is almost invisible to the eye when stretched taut.

Do I need plants in my pond?

If you have a pump and filter system established in your pond, plants can enhance these by also removing small amounts of nutrients and also providing some oxygen. Also, with today’s standard of fish food, all the essential “greens” and vitamins required are already supplemented to your fish. Most people love to see a “Water Lily” in full flower with a cover of lily pads, maybe a few fringe plants such as “Water Iris” and rushes and grasses. There is a huge selection of bog plants (10 – 20 cm water depth) to choose from as well as the deeper water aquatics such as Lily’s and Vallisneria. Plants are best used to finish your very own “aquascaped” pond for both cosmetic and filtration reasons.

How much do I feed my fish?

The biggest killer of fish in pond and aquariums is overfeeding. The uneaten food creates excess waste, and the extra food in a fishes gut can cause internal health disorders. Pellets are the most suitable type of food as it won’t cloud your water and is easily removable if you happen to overfeed your fish. Different size pellets are available: When using the correct size, your fish will require 3 – 4 pellets per day per fish, less in the cooler months. Different protein levels are also available if you are going to breed your fish, or just to improve their colour and well being.

What fish can I keep in my pond?

A general guideline is no more than 1 kilogram of Koi for every 1000 litres of water or 2 kilograms of goldfish per 1000 litres of water. The more fish you have the bigger the filtration system you’ll need. In a garden pond, coldwater fish are the only fish that will survive all year round. The two most popular types of coldwater fish are Goldfish and Koi (only NSW & WA can legally keep Koi). They can be compatible together in a pond, and are even fed the same pellets and food. Goldfish are suited to most sized aquariums and ponds, but Koi require a larger environment in which to grow to their best. A minimum pond depth of 40 cm is ideal for protection of the fish from UV rays and also cats and birds, although netting over the top can be used to prevent predation from cats & birds.

General Maintenance

Can I have a pond during water restrictions?

Yes, existing ponds with fish are exempt from water restrictions (you’ve got to keep your fish alive) but please check with local authorities before installing a pond or water feature.

Can I use grey water in my pond?

No, grey water has excess nutrients and chemicals that will kill your fish and pollute the pond.

Can I use rain water in my pond?

Yes, but you will need to use some mineral additives to make it better for the fish. In nature, rain water enters rivers and streams from runoff. During the runoff the water collects minerals from rocks and soil before entering the river or lake. Fish and plants need these minerals to thrive. Rain water collected from your roof has none of these minerals and is classed as ‘soft’. The easiest way to add these minerals is by additives such as Oase’s Hardness Plus. Your fish and plants will thank you for it! It is also best to not use rain water from the first rain and not use rain water if you are in an industrial area. If you’re worried about your water quality it is best to have it tested.

Can I use the pond water on my garden?

Yes, pond water is an excellent garden fertiliser but don’t put it on the garden if you’ve been using water treatments in your pond. And don’t use pond water on plants that are to be eaten by humans & animals.

Do I have to feed my fish?

Yes, we recommend using a premium quality fish food such as Oase Fishfit. This will ensure you have beautiful strong fish with bright colours. When you do feed your fish only give them what they can finish in two minutes. Uneaten fish food is a major food source of algae in ponds.

How can I keep my pond clean?

The best way to keep your pond clean is by a pump, biological filter and UV clarifier suited to the size and type of your pond. Oase filtration systems offer you a clear water money back guarantee when used within the manufacturer’s specifications. You can read more about these products in the filtration section. You should also remove the sludge from your pond floor because as this breaks down it releases nutrients that encourage algae to grow. The pond vacuum products mentioned above are best for this.

How can i stop my pond from Going Green?

A green pond can be caused by several factors. These include lack of filtration, incorrect pH values, overfeeding and overstocking of fish, excess sunlight and lack of proper maintenance. If your pond is well filtered and is still green, often the pH may be too high or low, causing the filter to work inefficiently. High pH levels can cause several problems, such as algal blooms because of the favourable conditions for it to flourish. Overfeeding & or overstocking of your pond can be easily rectified by simply reducing the amount of food given and also the amount of fish. Excess sunlight can also lead to problems with algae blooms. Increased filtration and the use of an Ultra Violet Clarifier will help solve this problem. Alternatively, a cover can be erected over the pond to give more shade. Algaecides are also available, and these are most affective when used as a short term remedy. Sometimes after a long holiday or when regular maintenance has not been possible, an algaecide can help regain the balance and clarity of your pond.

How can I stop the birds eating my fish?

Providing hiding spots for the fish by putting logs, plastic pipes and plants will help but sometimes you may have to resort to netting until the birds loose interest (and the fish grow too big for the birds to eat).

I have lots of stringy algae that looks like hair, what can I do?

String Algae is usually a sign of an imbalance within the pond. Reducing the amount of feed and ensuring you have a good biological filter that operates 24hrs a day will help remove excess nutrients from the pond. String algae prefers water with high pH so testing your water and reducing your pH with Clearpond pH down or Oase pH minus will also help. Oase Aquahumin will also help with String Algae by naturally reducing the pH of the water and changing the water to conditions unfavourable to string algae. String algae can also be controlled electronically by the Clearpond Algaeguard.

I'm not much of a gardener, are pond plants hard to keep?

No, as long as they receive a good dose of sunlight and regular fertilising using Aqua Grow Pond Tablets. These are slow release fertiliser tablets that you push down into the roots of the plants so they wont break down and pollute the water. Never add fertiliser directly to the water and don’t use manure as this will provide excess nutrients that will result in algae blooms.

I'm worried about wasting water, do I have to empty my pond to clean it?

No, in fact emptying your pond is the last thing you want to do, especially if you’ve got fish because they’ve gotten used to the environment in which they’re living and if you change all their water it will put them under much stress. Completely changing the water also provides any algae with nutrients from the new water and could make algae problems worse. The most effective way of cleaning your pond without wasting water or breaking your back is by using a pond vacuum cleaner. These products will remove the sludge from the bottom of the pond and allow you to reuse the water back in the pond or put it on your garden. There are electronic vacuum cleaners such as the Oase Pondovac and Pontec Pondomatic or products that will work from your garden hose such as the Clearpond Turbovac. With these products the need to completely empty your pond will be eliminated.

Is Full sun going to be a problem for my pond?

If you have both sun and shaded areas that you were considering installing a pond, the shaded areas would be preferable. Most plants prefer a little shade, and it is only the “Lily’s” that prefer at least half a day of full sun. If your pond is in full sun, accessories such as Ultra Violet Clarifiers can guarantee clear water when used correctly. They work on a principal of radiating water containing algae cells, effectively killing algae before it can bloom in your pond. The chance of a pond in full sun getting too hot is almost negligible when a pump is moving water. Moving water releases stored heat quicker than a stagnant pond, and if a minimum depth has been applied then you should have no worries.

Is my pond going to be Maintenance free?

NO! There is however a low maintenance filtration system which may require as little as ten minutes of your time on a monthly or bi-monthly basis. Biological filters remove nutrients and waste products from your pond, thus starving any algae from the essential food it needs to thrive. These types of filters must run 24 hours a day. In an unfiltered pond, a huge amount of aquatic plants and very few fish may result in a temporary biological balance, but once fish grow and breed it may be impossible to sustain this balance.

There's a lot of sludge on the bottom of my pond, what can I do?

You can vacuum sludge and all the muck from the bottom of your pond using a pond vacuum cleaner such as the Pondovac from Oase or Pondomatic from Pontec. These are electronic vacuums that do a great job of removing wast and saving water by preventing the need to drain and muck out ponds. The Clearpond Turbovac is another option that operates without the need for power. The Turbovac works off the garden hose and does a great job at a fraction of the cost of the electrical versions. Sludge can also be reduced by using bacterial type products like Clearpond Pondzyme or Oase Silt Remover. These products are a great maintenance aid for all ponds as they consume organic waste and reduce algae within the pond.

Where should I buy my pond products?

From stores that carry a good selection of products and have knowledgeable staff. Getting the right advice and equipment is critical to the success of your pond. If your store doesn’t have many pond products and can’t answer your questions then you should question their expertise and may be better off going somewhere else. Installing the wrong equipment can prove costly in the long run when you have to replace it. The cheapest way to build a pond is to do it right the first time so it’s worth the time finding a retailer that is right for you. You can select one of our dealers from the “Where to Buy” link at the top of the page.

Why are my fish dying?

Some common reasons why fish die are: -build up of toxins caused by lack of filtration, overfeeding or too many fish in the system -poor water conditions or sudden changes to water conditions -low oxygen in the water from lack of aeration -predators such as birds or mammals -parasites or disease Keeping fish in ponds is easy with the right equipment. If you loose fish speak to your local retailer and identify some of the possible reasons why. In most cases simple changes to your system will get you back on track and give your fish a safe environment to thrive.


Can I have different colours?

Yes – most water garden lighting is available in colours as well as white, natural light tones. Many of the halogen globe varieties of lighting are available with different coloured lens covers that can be interchanged to provide changes in the mood created by underwater or aboveground lighting. LED lighting is generally available in white light as well as solid colours and a mix of colours in the single light unit.

Can the lights go underwater?

Yes – all of the lighting listed in the Aquagarden and Oase range of lighting is designed to be fully submersed in water. Always check with Clearpond or your local distributor if you are planning to use lighting in an above water application to ensure suitability.

Do i need an electrician to install my light?

The complete range of lighting from Clearpond is designed to be installed by the home gardener in a DIY capacity. Please note that if at any time you are unsure of the correct procedure for installation of any electrical device it is essential to contact a qualified professional. Any permanent installation of a 240v electrical system should only be carried out by a qualified Electrician.

How bright are they?

Water garden lighting varies in brightness and intensity depending on style. They start from low 1 watt LED globes to 75 watt halogen lamps with variable light angles to allow the Water Gardener the ability to individualise their own unique creation.

What's the best way to light up my fountain?

The best way to light up a fountain is to position the light directly underneath the fountain head facing upwards. This enables the light to catch the moving water and provides a spectacular effect. This is easily achieved using the Oase Nautilus fountain pump and Lunaqua 3 lights by attaching the light to a special plate located on the pump. The Lunaqua 3 light sets can also be easily attached to any other fountain riser by a special fitting that comes with the kit.

Why should I be wary of cheap lights?

Cheaper brands of lighting can come with the inherent problems of reduced quality and performance. Cheap lights use a plastic lens that can expand and contract with the heat generated by the bulb. Over time this can cause the plastic to warp and allow water to penetrate the seal and damage the light. High quality lights such as those from Oase use a thick glass lens that will not warp. When choosing lighting for your water garden, remember that it is a product that will be in use for many years so always select the best product within your budget. Look for quality of fit and finish as well as cable length and ability to extend the system at a later date by adding more light units to a system. Better quality lighting is characterised by longer warranty periods, letting you know that the manufacturer is prepared to back up the quality of their product by guarantying the minimum expected life if used correctly.

Why should I light up my pond?

Adding lighting in a pond or water feature adds an entirely new dimension to your enjoyment. Lighting takes your water garden from a feature that can only be enjoyed in its fullest during daylight hours to a focal point of your garden at night. Lighting can be used to accent design features of your water garden and surrounding areas and create an ambience that can be calming or dramatic depending on intensity and positioning.


Are pond pumps noisy?

High quality pumps such as Oase are silent. Mid range pumps such as Eden are very quiet but as you go down in price the noisier a pump becomes. Some pumps can be easily heard in a shop display but sometimes the noise can be hidden by surrounding sounds. Ask your retailer how noisy the pump is before you buy and remember the rule of thumb – the cheaper the pump the noisier it is likely to be.

Are pond pumps safe?

Yes, pond pumps have been around for many years without problems or safety concerns and we would not be allowed to sell them if they weren’t safe. As a safety precaution we always recommend a safety switch be installed on the house. Also that all water based electrical equipment should be unplugged before water gardeners immerse any part of their body in the water or clean a filter or UV Light.

Are there different types of pond pumps?

Yes, depending on your needs there are several application specific pumps available such as fountain, water feature and filtration pumps.

Can I cut the cord on my pump?

We allow plugs to be cut and replaced if necessary, but for safety and warranty purposes we do not allow you to shorten the cord. We recommend a qualified electrician performs any electrical work but do not permit shortening of cords even if done by an electrician.

Can I hard wire my pump into the power supply?

Yes you can but remember you will always need to remove the pump from the pond for cleaning, repair or replacement so always keep this in mind when installing pumps or any pond equipment. Always make your equipment easy to remove.

Can i repair my pond pump?

If it is a damaged impellor, yes you can purchase another one and replace this but otherwise you would not be able to fix any other problems that may occur and it is best to return it to your place of purchase to be assessed and repaired if possible by our qualified technicians. Attempting repairs yourself will void the warranty.

Can i run my pump outside of the pond?

Some pumps can but we recommend using them as they were designed – submersed in water. This will enable the pump to run at a cooler temperature. Pumps that can be run outside of the pond will need to be situated below the water level and be gravity fed as no pond pump can suck water upwards. Most of the Oase range of pumps can be run out of the pond but ask your retailer before purchasing to make sure.

Can I use my pump in chlorinated water?

No, pond pumps cannot be used in chlorine as the chlorine calcifies on the impellor which can cause damage to both the pump and impellor and will void any warranty claim. Pump friendly water treatments such as Clearpond Feature Clean will have the same effect as chlorine without damaging the pump.

Can i use my pump in salt water?

No, as a general rule. The majority of pond pumps on the market cannot be used in salt water as the salt builds up on the impellor which can cause damage to both the pump and impellor and this would not be covered under warranty. You would have to specifically ask for a pump that is rated to be used in salt water such as our Eden range of pumps.

Do i need an electrician to install my pump?

No, not at all, they are a standard electrical product that needs to be plugged into a weatherproof switch if being used outdoors.

Do i need to clean my pond pump?

Yes, all pond pumps require maintenance and cleaning from time to time depending on the water quality. Pumps with pre filters will require more maintenance as the filters do clog up easily and restrict the performance of the pump. Always ask your retailer to show you how to clean the pump before you buy it.

Does the hose affect the pump?

Yes, the larger the hose you use the more flow you will allow the pump to produce, the smaller the hose the more friction loss or restriction you place on the pump and the less water you will produce.

How do i clean my pump?

For pumps with pre filters you will need to remove the pre filter from the front of the pump, rinse out the filter and also check and clean the impellor inside the pump. For those pumps with a cage design like Oase, you will need to wipe any leaves or build up off the cage and open the cage and check the pump and impellor every now and then. Always ask your retailer to show you how to clean the pump before you buy it.

How do i select a pond pump?

The question is largely dependent on your needs, you must decide whether the pump will be used for filtration, a water feature or to decorate a pond with a fountain. Once you have established the application of the pump you will then need to determine the size of the pump you require, this is best done by visiting one of our Oase dealers to get the right advice.

How many hours a day should I run my pump?

You should always run your pump 24/7 to ensure good water quality and prevent stagnant water which will allow mosquito’s to breed. This is especially important if you have fish in your pond as stopping the circulation will reduce oxygen levels in the pond and may lead to fish kills.

How much do pond pumps cost to run?

Pond pumps have a very low power consumption and therefore cost very little to run. As a general guide for every watt of power they will cost roughly $1 a watt per year to run 24 hours, 7 days a week. Eg. 80 watts = $80 per year in running costs. This is an approximation only and will vary between areas. Please check with your local power authority for confirmation.

I don't want to see the cord coming out of my pond, how can i hide it?

If the cord cannot be concealed using the natural materials around the pond such as rocks and garden beds, you can use products such as the Oase Tradux which is a cable transition that allows you to pass the cable through the wall of the pond with a water proof seal rather than over the edge. The Oase Tradux does this without the need to cut the plug off the pump.

My pump isn't working, what should i do?

First turn off the power, then check the pump and impellor and clean if necessary. If it is still not working or damaged then return the pump to your place of purchase and have them check it. If your retailer cannot fix the pump then return it to Clearpond to be assessed for repairs or warranty.

What does head height mean?

Head height is the maximum height to which a pump can push water, at this height the pump will only produce a trickle.

What happens if i forget to top up my water feature and my pump runs dry?

This will depend on whether your pump has a thermal safety switch or not. Quality pumps such as Oase will have a thermal safety switch built in, this is a safety mechanism that will turn the pump off and protect it if it overheats. Pumps without a thermal safety switch will traditionally burn themselves out when they are run dry and overheat, once this occurs you will notice a warping of the pump at which point the pumps will no longer work, are irrepairable and would not be covered under warranty.

What is so special about Oase pond pumps?

Oase (Germany) are the world leader’s in pond technology, their pumps and other pond products are scientifically tested and proven prior to release on the market so you can be safe in the knowledge that they work and are reliable. The main benefits of the Oase pumps are, lowest power consumption on the market, they’re silent, have a thermal safety switch to prevent overheating, they’re application specific, require little maintenance and come with a 5 year warranty including the impellor.

What should i consider when buying a pump?

– The application. – Running costs. – Submersible or External running. – Safety of a thermal safety switch. – Maintenance. – Quiet/Silent. – Reliability. – Extended Warranty.

What type of hose should i use?

The best hose to use is Clearpond’s Pondflex Black hose which is a black corrugated, flexible, non kink hose which comes in a range of sizes from 13mm through to 76mm.

What's so special about pond pumps?

Pond pumps are designed to run continuously, have lower power consumption than pool or sump pumps, are compact and submersible.

Why can't I use my old swimming pool pump?

We do not recommend it, as most pool pumps are not rated to run continuously, have more moving parts and have very high power consumption therefore very high running costs.

Why do i need a Pump?

Ponds require water movement to maintain a healthy, well-balanced pond or to create an impressive water feature. Moving water can offer benefits to any type of water feature in the form of recirculation, aeration, and ornamentation. The best way to move water in a pond is by installing a pump. Even if your pond is solely ornamental, a pump will be required to prevent stagnation, inhibit algae growth, inhibit insect pests, and to power a decorative water display. Stagnant water tends to have a distinctive, unpleasant scent, which is generally undesirable for an ornamental pond. Streams, waterfalls, fountains, and spitters all require a pump.

Why do pond pumps vary so much in price?

With price comes quality, the more expensive pumps such as Oase will have more features and benefits such as thermal safety switches, lower power consumption, silence, reliability and reduced maintenance through the use of cages rather than foam pre filters all backed by a longer warranty period. The cheaper pond pumps are traditionally very basic, have higher power consumption, are less reliable and have a shorter warranty. Generally speaking, European pumps such as Oase (Germany) and Eden (Italy) are made to higher quality standards than Asian pumps. “You get what you pay for”.

Will my pump keep the water clean?

No, it will definitely help by turning over and oxygenating the water but at some point you will need the help of filtration or treatments to keep your water clean. The sponge filters that are found on some pumps are not capable of keeping water clean, they are only there to protect the moving impellor from particle damage.

Will the pump harm my fish?

Definitely not, a pump will actually help improve the health of your fish by turning over the water and improving the water quality in your pond.

Water Treatments

Are there any non-chemical water treatments available?

Yes, some treatments use chemicals but some use natural products such as bacteria and enzymes.

Are they safe for fish and plants?

All of our water treatments are safe for fish and plants when used as per the instructions. The only exception to this is Clearpond Feature Clean which is designed specifically for water features and therefore uses a formulation that is not suitable for fish or plants.

Do I need water treatments if I have a filter system?

Filtration systems are designed to reduce the amount of pollutants from a pond and starve algae of its food source. The first step is to make sure you’ve got a filtration system that is capable of filtering the size of your pond and the amount of fish you have in it (further information on filtration can be found in the filtration section of the FAQ’s). If you have a well balanced pond with a good working filter then it’s unlikely that you’ll be a regular user of water treatments but you may need some from time to time.

How do I know if I need water treatments?

If you’re experiencing problems with excess algae, poor plant growth or fish health problems then you should start looking at the reasons why. Testing the water is a good start as this can determine if the pond is out of balance. Testing the water before you use a water treatment is also a good idea because many of them won’t work as well if the pond has unfavorable water conditions. Testing the water will help identify problems that water treatments can fix or if you need to consider other alternatives such as filtration.

How do I know which treatment to use?

You can start by looking through the product descriptions on our website or by reading the packaging in the shops. Some water treatments are easy to work out because they target a specific problem. e.g. Clearpond Pondclean kills algae that turn ponds green and Clearpond Pondzyme cleans up sludge from the bottom of the pond. Some treatments are algae preventatives like Oase Aquahumin and some alter the water’s chemistry like Clearpond pH down. Whilst all of these treatments are beneficial for you pond some of them might need further explanation as to how they work. You can get further information by reading the packaging and instructions on the bottles or by asking your local stockist.

How do I use them?

In most cases the best method is to take a bucket of your pond water, mix in the correct amount of liquid or powder and distribute throughout the pond. Some treatments differ from this procedure so please follow the instructions.

I don't like chemistry, is testing the water easy?

You don’t have to revisit your high school chemistry days to test your water. There are two types of water tests – the drip test and Oase Quicksticks. Drip tests work by taking a small sample of water in a test jar, adding some drops or powder and checking it against a colour chart to tell you the reading. All of the equipment comes with the products. Examples of these test kits are the Oase Consumer Test Kit and Oase Test Kit Plus. Whilst these test kits are easy to use the Oase Quicksticks are even easier. These use a paper strip that is dipped into the water and then held against a colour chart to determine the reading. Whatever method you choose, testing the water is easy and should be part of every pond keeper’s routine.

What types of water treatments are there?

There are treatments for a range of problems including; -killing floating algae that turns water green -preventing algae -balancing and stabilizing the pond’s water chemistry -reducing sludge -increasing oxygen levels -altering important water chemistry conditions like pH and hardness -improving biological filters with beneficial bacteria -removing algae from water features -removing chlorine from tap water -improving the hardness of rain (tank) water -clearing cloudy water -removing ammonia from the water There are water treatments available to help with most pond problems. To find out more, speak to your local retailer.

When should I use a water treatment?

When you need to. Although water treatments are safe to use it’s not a good idea to use them when you don’t have to. For example, it’s unlikely that you’d need to use an algaecide over the winter months because algae naturally die off over this time of year so why load you system with unnecessary products? Depending on your pond, you may need to use balancing products like Clearpond pH down or Oase Aquahumin all year round as these products provide stability and maintain the general health of your pond.

Will water treatments fix my problems?

Quality water treatments such as those from Oase and Clearpond are effective in their applications provided they are used in accordance with their instructions. This includes both dosage rates and water chemistry. While water treatments are effective, the need to use them usually identifies underlying problems with your pond such as excess nutrients from runoff, organic pollution, too many fish or over feeding. If you’re using water treatments all the time you should look at the reasons why and speak to your local retailer to work out better long term options. In many cases the cost of purchasing a filtration system is soon recovered by the savings on water treatments.