{TOP 5} Best Pond Filters For You

Best Pond Filters For You Reviews 2019

Welcome to our best pond filter review. Here we present you a review of five best pond filters. We have put together detailed background information. With it, we would like to make the purchase decision more comfortable and help you to find the best pond filter for you.

What Is Pond Filter?

By means of a pump, a pond filter conveys the water from the pond into a container with various filter media. There, impurities are filtered out biologically and mechanically.

The filter ensures that the visibility and water quality in the pond are improved. This makes it a visually appealing, healthy habitat for fish and plants.

The most common types of pond filters are the continuous, the pressurized, and the underwater filters. For an ideal result, the system should match the nature of the water. Below we provide a list of the best koi pond filter on sale.

TOP 5 Best Koi Pond Filters

Comparison Table

Product Name


Filter Type

Filter Type


 Berlan Set Pond Filter 12,000 l + Water Clarifier 18 Watt

Continuous flow filter

54 x 47 x 42 cm

Up to 12000 liters

Berlan Pressure Filter UV-C BDF10000 UVC

Pressure filter

50 x 38 x 50 cm

Up to 11000 liters

Oase Biosmart UVC 16000

Continuous flow filter

39 x 56.5 x 42 cm

Up to 16000 liters

 Pontec MultiClear Flow Through Filter Set 5000

Continuous flow filter

38 x 28 x 37 cm

Up to 5000 liters

 T.I.P. TAF 5000 UV 7 Pond Filter, UV-C 7 Watt, for Ponds up to 5000 Litres

External filter

43 x 30 x 37 cm

Up to 5000 liters


  1   Berlan BTF12000 pond filter

Berlan Set Pond Filter 12,000 l + Water Clarifier 18 Watt

The BTL12000 continuous flow filter from Berlan is perhaps the best koi pond filter for the money when compared to more expensive manufacturers. With a suitable pump and UV lamp, this filter offers all the advantages and disadvantages common to continuous flow filters.

The Berlan BTF12000 is designed as an external filter for all small ponds and medium-sized ponds up to 12,000 liters. Most conventional garden ponds will not exceed this size.

The maximum water volume of 12,000l corresponds to a pond size of 12 m³. So you can imagine more of it: the pond could have the dimensions 4 x 3 m and a depth of 2 m. This makes the filter probably suitable for most decorative garden ponds.

Of course, with the Berlan BTF12000 fishponds can also be filtered. However, as usual, the manufacturer recommends that the size of the pond be halved in order to maintain optimum filter performance. This results from the fact that fish additionally pollute pond water. In this case, this corresponds to a size of 6000l or 6 m³.

Small ornamental fish species, goldfish or even a handful of beautiful koi will feel good. Please note that koi are sensitive and it is therefore recommended to reduce the pond size again.

Since this Berlan model is just the filter, not a set, a suitable pump should already be in place or subsequently re-purchased. Suitable pond pumps from Berlan or other manufacturers. The pump mustn't exceed a flow rate of 8000 liters per hour.

The filter is not designed for larger flow rates. If an improper pump is connected, the filter may overflow or affect the performance of the filter media as the water does not stay in the filter long enough. The energy consumption of the filter depends on the selected pump and UV-C unit and therefore, cannot be determined exactly.

Depending on the pond size and algae growth, a UV-C device should also be connected to the filter. The manufacturer's recommended 18 Watt device can be used for this. Models from other manufacturers with matching connection are also suitable.

With dimensions of 540 x 470 x 420 mm and a weight of around 8 kg, the Berlan BTF12000 is not one of the most compact models. In addition to small DIY, the over half a meter long, black plastic case may seem a bit clunky.

A solution to this, for example, offers a roof made of wood, which - painted green - does not stand out as much between the pond plants. The larger the pond, the less the pond filter will catch your eye. Often even a higher shrub is enough to camouflage the filter.

  2   Berlan BDF10000-UVC pressure filter

Berlan Pressure Filter UV-C BDF10000 UVC

The Berlan BDF10000-UVC, a pressure filter with UV-C unit, offers all the advantages and disadvantages of pressure filters. It is suitable for ponds up to 10,000 liters and can easily feed streams.

The Berlan BDF10000-UVC pressure filter model can be used for small and medium-sized ponds. The pond filter is also able to feed streams or waterfalls.

The capacity of the filter is suitable for ponds up to a volume of 10,000 l, which corresponds to 10 m³. For example, the pond can measure 5 x 2 m at a depth of two meters. For most decorative garden ponds, the performance should be sufficient.

Many species of fish in large numbers will be comfortable in a pond of this size. Note, however, that with large fish stocks, the water is additionally burdened and polluted. For an optimal filter result, the Berlan BDF10000 should only be used in fish ponds up to 5000l.

In principle, the same applies to a koi pond. The pond size should, however, possibly be reduced a bit, to guarantee the large and sensitive Kois as clear as possible pond water.

The Berlan BDF10000-UVC is delivered without a pump. The maximum delivery rate and the energy consumption, therefore, depend on which pump you connect to the filter. A UV-C clarifier with an output of 11 watts is included.

Since this model is a pressure filter, the selected pump should be able to provide a correspondingly high flow rate. The choice of the pump is up to the customer and should also be adapted to the pond system. To feed a stream, the flow rate should be at least 2500 l / h.

Although the filter can support much larger flow rates, the actual filter performance becomes weaker if the water is moved too fast and therefore lingers too short in the filter. The included UV lamp offers 11 watts of power, which is comparable to competing products.

The bucket-shaped plastic container, a design typical for pressure filters, has dimensions of 400 x 380 x 480 mm. The weight is around 7 kg. The Berlan BDF10000 is not one of the smallest pressure filters; but because it can be buried in the ground, that is not so important. So it can easily be integrated very inconspicuously into the water garden.

  3   Oasis BioSmart UVC 16000 continuous filter

Oase Biosmart UVC 16000

The market leader manufacturer's BioSmart UVC 16000 promises to guarantee clear pond water by combining mechanical-biological cleaning with effective UVC technology. It offers all the advantages and disadvantages of a continuous filter.

The BioSmart UVC 16000 Oasis is a continuous filter built for all small and medium-sized ponds. For the average garden pond with or without fish its performance should be sufficient.

For most filters, the maximum capacity is taken from the model name. In this case, the pond size is limited to 16,000 liters. This corresponds to a volume of 16 cubic meters. As you determine the volume of your pond, you can read in our purchase criteria.

A pond of 16,000l is a medium-sized garden pond. For example, it could have the dimensions 4 x 4 m at a depth of 2 m.

If the pond is to be filled with fish, the filter performance is reduced to half. This is because fish pose an additional pollution burden on the water. The oasis BioSmart 16000 can be used for fish ponds up to 8 m³. This is more than enough space for some goldfish or other small ornamental fish species.

The Oasis BioSmart UVC 16000 comes with integrated UV-C unit but without a pump. The UV-C power is 11 watts. As this Oasis model is not a complete set, a suitable pump should already be available or subsequently re-purchased. Suitable pond pumps from oasis or other manufacturers.

The pump mustn't exceed a flow rate of 5500 liters per hour. The filter is not designed for larger flow rates. Connecting an improper pump may overflow the filter or affect the performance of the filter media.

The energy consumption of the filter is largely dependent on the pump selected and therefore, cannot be determined accurately. The built-in UV lamp offers an output of 11 watts. This is sufficient for smaller ponds or mild algae infestation. In other cases, you may need to get a stronger bulb.

The outer dimensions of the Oase BioSmart continuous filter are 380 x 560 x 410 mm. Thus, the device is not super compact but still in the frame. The filter weighs 5.40 kg.

The look of this model is typical of many pass filters. The case is black and box-shaped. Some customers confirm that the filter, despite its not so narrow dimensions, can be camouflaged relatively well behind a bush, for example.

  4   Pontec MultiClear Set 5000 continuous filter

 Pontec MultiClear Flow Through Filter Set 5000

The company Pontec offers with the MultiClear Set 5000 a complete ready-to-use filter set. As such, it brings along all the advantages and disadvantages of this type of filter. With the enclosed pump and the UV-C clarifier, it is designed for all smaller garden ponds.

The Pontec MultiClear Set 5000 is a complete flow filter set up next to the pond. The set is suitable for a maximum water volume of 5000 liters. A pond size of 5000l corresponds to 5m³. For example, your pond can measure 5 x 2 m at a depth of 1 m. Of course, the filter can also be used for all smaller ponds.

The pass filter from Pontec can also be used to filter fish ponds. Some customers also report turtles or ducks in the pond. For a pond with fish stock, the performance of the filter is reduced by half, as fish represent an additional burden on the water. The garden pond with fish inhabitants should therefore not exceed a size of 2500l.

The MultiClear Set 5000 is one of the ideal pond filters that can also be used to filter Koi fish waters. This species is happiest when there are at least 1000 l of water available for every fish from a group of ten Koi’s onwards.

This set by Pontec includes a pump and UV-C clarifier. The pump delivers a maximum of 1500 liters per hour. The UV-C power is 7 watts.

The enclosed pump is ideally adapted to the filter and can move 1500 liters of water every hour. This value is good on average compared to other products. The maximum flow rate should be sufficient for your small pond, in any case, to rid the water from dirt.

To effectively remove algae from the water, a UV-C clarifier is included. The power of 7 W is normal for this filter size. There are no specifications for the energy consumption of the pump. He is usually at a pump of this strength but 20 to 25 watts.

The Pontec MultiClear 5000 has dimensions of 385 x 285 x 370 mm and a weight of 5.40 kg. The box-shaped design is quite typical for a continuous flow filter. With dimensions, the model of Pontec is quite compact. It should not be a problem to integrate the filter into the water garden inconspicuously.

The low weight makes it easy to dismantle the filter for the winter months and transport it to a dry place.

  5   TIP TAF 5000 pond external filter

T.I.P. TAF 5000 UV 7 Pond Filter, UV-C 7 Watt, for Ponds up to 5000 Litres

The pond external filter TAF 5000 is a complete solution for small to medium-sized ponds from the renowned TIP The filter works with a multi-chamber system: The water passes through several chambers with different filter media. With this product, you get ready to use the device.

As the model name suggests, the TIP TAF 5000 is designed for ponds up to a maximum volume of 5000 l (or 5 m³). This allows him to clean all small and medium-sized ponds. For example, a pond measuring 5 x 2 x 1 m falls into this category.

The filter is therefore well suited for small decorative ponds, also with plant stock. If you want to keep fish in your pond, the pelvis should be smaller. It is usually recommended to halve the pond size with fish stock so that the filter can still be properly cleaned. In ponds of this size, some goldfish or other small fish species can easily live. This is perhaps the best small koi pond filter.

However, to filter a koi pond, the TIP is not powerful enough. For Koi's husbandry, it is recommended to include at least 1000 liters for each fish. So a maximum of three koi can be placed in a 2500 l pond.

The complete set of the TIP TAF 5000 pond external filter includes both pump and UV lamp. The maximum flow rate of the pump is indicated at 1200 l / h; the UV light bulb has a power of 7 watts.

The energy consumption of the system consists of a pump and UV-C emitter. With 20 watts, the power consumption of the pump is limited. It can, therefore, be safely operated for long periods.

The motor of the pump is powerful enough to circulate the pond water sufficiently with 1200 liters per hour. At the same time, if desired, a stream can also be fed by the pump. Attach another hose.

The UV-C lamp is not noticeable with its 7 watts on the billing. Nevertheless, it contributes a lot to the elimination of algae.

With dimensions of 475 x 310 x 390 mm, the TIP external filter is still quite compact. A piece placed next to the pond; it can still be hidden well under rock covers. The weight of 5.80 kg is not difficult to lift on its own.

What should you know about cleaning and maintenance of pond filter

If the pond filter works well, the suspended particles, dirt particles, algae, etc. which it combs out of the water, gradually clog up the pores. In addition, the filter bacteria located on the filter material multiply.

All this damages the permeability and effectiveness of the filter. In order to keep the full performance, you have to maintain it regularly. Here it applies that larger filter plants must be cleaned less frequently.

For cleaning, you must first turn off the pump to stop the water flow. Then you open the case, remove the filter mats, and wash them thoroughly with cold water. This is best done with a garden hose. Repeated rinsing and wringing is recommended.

It is important not to use hot water or dishwashing liquid in order not to destroy the bacteria cultures living in the mats. The filter should, therefore, never be washed completely.

During the season, you should not clean more than twice in order not to endanger the biological balance inside. Maintenance of the pond filter also requires proper and timely wintering to prevent frost damage to the system and the pump.

In addition, you can, of course, also use a pond vacuum cleaner for cleaning. With this device, which works much like a vacuum cleaner, you can rid the bottom of the pond of mud and algae.

To clean a pond filter, the pump must be turned off and the housing opened. Then the filter mats are removed and rinsed with cold water.

Things to Consider Before Purchasing a Pond Filter

These factors allow you to determine the best pond filters on sale. Before you choose a pond filter for your planned or already created pond, you should consider a few things. To give you an overview, we will list the most important points here.

Pond size

The most important decision point is the pond size. Depending on how much water is in your pond, the filter must be able to circulate larger or smaller masses. If the filter is not strong enough for your pond, it will not be able to clear the water enough.

The pond size is a volume and is therefore given in cubic meters (m³) or liters (l). Here we show you how to quickly and easily calculate which filter you need. The rule of thumb is length x width x depth x ½

For example, your oval pond is 5 m long at the longest point, 2 m wide at the widest point, and 1 m deep at its deepest point. 5 x 2 x 1 x ½ = 5 your pond volume is therefore 5 m³. To give that in liters, calculate your result x 1000. So 5 x 1000 = 5000l.

So choose a filter that is suitable for at least 5000l volume. For most models, this number is already indicated in the title ("Pontec Pass Filter MultiClear Set 5000").

Fish stock

If fish live in your pond, it also affects your filter choice, because fish add additional burden on the water in the form of their waste production. The dirtier the water, the more efficient the matching filter must of course be.


Usually, the product description specifies the filter performance for a fish pond as half the size of a natural pond. The filter volume must, therefore, be twice as large.

Since the filter capacity for a fishpond has to be only half as big as for a natural pond, you should choose a fish stocking with a capacity of 10,000 liters for your pond measuring 5 x 2 x 1 meters.

Pond shape

Apart from the pond size, the pond shape can also change the demands on your filter. In particular, you should consider the filter purchase, if you want to have a gradient in your pond system such as a stream or waterfall. Even water games of various shapes and fountains cannot be operated with all types of filters.

In the event that you want to pump uphill in your pond water, for example, to flow back over a stream on the slope, a pressure filter would be the best. This saves you the purchase and operation of additional pumps.

Water features beautify the look of the pond and provide for the supply of oxygen. They can be placed separately in the pond; but for small ponds it is certainly more useful to use underwater filter with built-in nozzle for a water feature.


You should also consider how much time and effort you are willing to invest in maintaining your filter. After commissioning, each filter must be regularly maintained. In some systems, however, the handles are much less complicated than others. The difference in maintenance is mainly in the material used inside the filter.

Most commercial pressure and flow filters use various types of filter sponges and mats. These clog with time and should, therefore, be removed from the filter and washed a few times a season to restore full performance.

In nonwoven filters, a nonwoven or paper roll is used as the filter medium. This can easily be replaced. A drum filter even cleans itself automatically.

If this work is too time-consuming or dirty, consider investing in a semi or a fully automated system. Bead filters have a built-in cleaning function that makes cleaning easier.

Maximum flow

In the description of many pond filters you will come across an indication with the unit liters per hour (l / h). This information refers to the so-called maximum flow rate or flow rate of the filter and is usually from a few hundred to a few thousand liters.

The number indicates how much pond water per hour can be pumped through the filter without damaging it. This is especially important when choosing the pump you want to use with your filter.

If the pump is too strong, the pond filter may even burst. Make sure that you adjust the pump output with the maximum flow rate of the filter.

Maybe you think a higher flow rate is certainly better as more water is moved in less time. However, this is not entirely true: if the water is moved too quickly, it will not stay in the filter for long enough to be effectively cleaned.


Another important aspect before purchasing a koi pond filter is of course the price. Only you know what budget is available to you. Also in your price range you will surely find the best pond filter

A good filter does not necessarily have to be very expensive! Even for a small budget of less than 100 euros, you get underwater filters for ponds up to 5 m³, which are powerful and often have even integrated a water feature. Even pressure filter sets and some models of flow filters do not cost much more.

However, you have to dig deeper into your pocket to buy semi-automated systems. Drum and fleece filters, as well as bead filters, are very high priced at one to several thousand euros but offer more comfort in operation and excellent filter performance.

Power consumption

Of course, for a filter to operate, it must be connected to the power supply. The main energy consumption here is the pump, which carries the water either from the pond into the filter or from the filter back into the pond.

Most filters require no energy: the water flows with gravity or through the pressure of the pump. The automatic filter installed in the drum filter, on the other hand, needs power.

An alternative to laying a long power cable is solar panels. Depending on their size, they can only operate a small pump (3-5 watts) or a powerful pump and also the UV-C device (up to 25 watts).

Using a battery, the generated energy is stored and thus enables the filter operation even without sunlight. Of course, the solar system works best in a location with sufficient sunlight.


As already mentioned, the required filter type is determined by the type of pond. There are very different ponds, ranging from small ornamental pans, over fish tanks to large swimming ponds.

Another special case is the koi ponds. Since koi’s are a sensitive and very large species of fish, a larger filter volume is necessary than for other fishponds. Choosing a suitable filter is especially important when designing an ideal Koi pond. So you should be careful when reading the product description that suitability for ideal koi ponds is mentioned.

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