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The 10 Best Pond Filters

It can be really frustrating trying to locate the best pond filter. The point is often to try things out and see what works, which can quickly turn up a hefty bill. In any case, you know how important good filtering is.

It is imperative that you keep the water quality high to ensure the health of your fish and plants.

The best pond filters reviewed below are a compilation of the best pond filters available.

BestForPets (bestforpets.org) has pond filters that can fit every budget, from just a few dollars to a few hundred.

A Reference For Shoppers

The Pond Filter: Why You Need It Instead of Just a Pump.

With the aid of a pond pump, you can keep the water in your pond circulating and aerated, preventing sediment and debris from sinking to the bottom.

But a pump by itself doesn’t do anything about the waste water contains, so it keeps recirculating until it eventually clogs the pump. Water pollution and sediment may be greatly reduced by using a filter.

A pond filter’s primary advantage is that it provides a favorable habitat for the colonization and maintenance of beneficial microorganisms.

Ammonia and nitrites are chemical waste products that can only be removed with the help of beneficial microorganisms. While a pond without fish and other creatures may not need a filter specifically for this reason, having one will nevertheless improve water quality and cleanliness.

Selecting the Appropriate Pond Filter

  • Extent of the Pond

The size of the filter required will be dependent on the dimensions of your pond. There are, however, filters available whose pumps are sold separately.

In this scenario, select a filter whose flow rate is commensurate with the number of gallons per hour your pump is required to process.

  • FPH (Feel-Per-Hour)

Your pond’s gallons per hour should be equal to or greater than half the pond’s volume. A filter and pump capable of handling 500-1,000 gallons of water per hour would likely be required for a pond of 1,000 gallons’ capacity.

In order to increase the pond’s oxygen levels or get a better handle on the trash, some individuals would purposefully over-filter it. Under-filtering can cause waste buildup and water stagnation, while over-filtering is unlikely to be an issue.

  • Stocking

Choosing an appropriate filter depends heavily on how you want to populate your pond. A few minnows can create a lot less trash than a huge fish like a koi or an amphibian like a turtle.

To prevent the accumulation of harmful byproducts, the filter will need to be robust enough to process the waste being generated.

  • Attitude Adjustment

It’s also important to think about how flat the terrain is surrounding your pond. With a waterfall pond, you’ll need a filter that can force water upwards.

There will be a backup in the filter and the water supply will be disrupted if this happens. Which filter you should get depends in part on how level the bottom of your pond is.

The form and height of the submerged filter you select should be tailored to the dimensions of your pond.


The SunSun pressurized pool filter, with its efficient filtration and low price, is the best pond filter overall. The TetraPond submersible flat-box filter is a great choice for filtration and bacterial colonization if you’re on a tight budget.

Those looking for a long-lasting, high-quality product will find their needs best met by the Lifegard Aquatics Trio Fish Pond Filter.

Choosing the best pond filters does not have to be a time-consuming and fruitless challenge. You will be able to find out what type and how much filtration you need for your pond by reading these reviews and reviewing the information provided by BestForPets (bestforpets.org). That will assist you in choosing the most suitable pond filter.


The SunSun Pressurized Pond Filter Is the Best Available Option

  • 427 cubic feet per hour Filtered
  • A pond of 4,000 to 8,000 gallons in volume.
  • stages of filtration two
  • Location External

The SunSun Pressurized Pond Filter, with a flow rate of 4,227 GPH, is the finest pond filter on the market. A pond up to 8,000 gallons in size can benefit from the mechanical and biological filtration that this filter provides.

There’s a UV light sanitizer built in, and its settings are independent of the filter’s. The filter can be easily adjusted from the exterior of the pond, where it is perched on a control panel that is also easily reached.

It is small enough to conceal well, measuring 14.24″ x 14.25″ x 27.5″ The filter may be cleaned without ever opening the device thanks to its built-in cleaning mechanism. It’s only necessary to open it up for filter media or part replacement and maintenance.

There is no pump with this filter, which is essential to its operation. The pump you select, which can be any size, must have a filtration capacity of at least 4,227 gallons per hour. In order to keep working, the UV lamp must be replaced every 6,000-8,000 hours.


  • Has the potential to hold a pond of up to 8000 gallons
  • Incorporates a UV-C Light Sanitizer
  • It’s simple to adjust the filters.
  • The pump is small enough to conceal outside the pond.
  • The built-in cleaning system makes cleanup a breeze.
  • Biological and mechanical filter media are also included.


  • Doesn’t come with a pump
  • UV-Press Pond Filter – Top Pick Overall, Replace UV Lamp Every 6,000-8,000 Hours


Best Price on the Market: TetraPond Submersible Flat Box Filter

  • Filtration rate, in gallons per hour, from 200 to 2,000
  • 500 Gallon Pond Size
  • stages of filtration two
  • Location Internal

The TetraPond Submersible Flat Box Filter is the greatest pond filter for the money if you’re on a strict budget. This device has a two-stage filtration system that employs both fine and coarse filter pads to ensure that your water remains pure.

All necessary tubing and connectors to attach the filter to a pump are included. It has a filtration capacity of 200-2,000 GPH, making it suitable for ponds as large as 500 gallons.

Since it is black and completely underwater, this filter will not stand out at the pond’s base. This filter has dimensions of 12.44 by 10.31 by 4.66 inches (inches), making it ideal for use on the bottom of a pond.

A pump capable of moving between 200 and 2,000 gallons per hour (GPH) is not included with this filter; you will need to buy one separately.

There is no ultraviolet light or any extra features on this filter. To prevent buildup, the filter medium must be cleaned on a regular basis.


  • Highest quality at the lowest possible cost
  • A pond up to 500 gallons in size is possible here.
  • Equipped with both fine and coarse filtering foam
  • Capacity of filtering between 200 and 2,000 gallons per hour
  • Equipped with the necessary tubes and connectors to attach to a pump.
  • Completely invisible on the pond floor


  • Doesn’t come with a pump
  • Lack of routine maintenance might lead to clogged filter media.


Best Fish Pond Filter: The Lifegard Aquatics Trio

  • A filtration system with a capacity of 2,000
  • The pond holds 4,000 gallons of water.
  • Stages of filtration two
  • Location Internal

The Lifegard Aquatics Trio Fish Pond Filter is the best pond filter available. This underwater filter has both biological and mechanical filter material to keep your pond clean in two separate stages of filtration.

It’s designed for ponds with animals in them, making it a good option for fish and amphibians, and it can handle ponds up to 4,000 gallons in volume.

Since the pump is included inside the filter, it is unnecessary to buy a separate pump. It comes with a fountain and spray accessories to turn your pond into an attractive water feature. This filter is powered by a 20-foot power cord, so you won’t have to use as many extension cords.

One of the largest underwater filters on the market, this pump has dimensions of 16″ x 16″ x 11″. Filter foam in the shape of a triangle prism is used to create the filter. Foam replacements may be hard to come by in the event of a necessity.


  • Biological and mechanical filter medium are both included
  • Up to 4,000 gallons of water may be held in the pond.
  • Designed for use in ponds that already contain animals.
  • ability to filter 2,000 gallons per hour
  • Pump and power cord both included in
  • Incorporates a spraying mechanism inside the fountain


  • Quite a huge filter
  • There is nothing typical about the size or form of filter foam.
  • The phrase “premium price”


CNZ Sterilizer and Filter for Ponds, 13W

  • 660 Filtered Gallons Per Hour
  • 1200 Gallon Pond Size
  • Stages of filtration two
  • Location Internal

Mechanical filtration is handled by a sizable chunk of filter foam, while biological filtration is handled by three separate baskets of media in the CNZ All In One Pond Filter with 13W Sterilizer.

A 13-watt UV sterilizer is included to further improve the purity of the water. It has a built-in pump and can handle ponds up to 1,200 gallons in size.

The power cord is 32 feet, and the fountain tube’s height adjusts from 9.66″ to 15.77.” The water can be redirected to a different water feature, such as a waterfall. The dimensions of this pump when submerged are 14.98 by 10.56 by 5.36 inches.

Cleaning and maintaining the filter pump and UV light do require the use of a screwdriver to disassemble the components from their housing.

Because the UV filter is designed more for prevention than treatment, it is recommended for for ponds with minimal algae development. If the pump is on, the ultraviolet light is constantly on and cannot be shut off.


  • A pond up to 1,200 gallons in volume is possible there.
  • Comprises of a mechanical filter and three biological baskets
  • Incorporates a UV-C Light Sanitizer
  • Constructed with a pump and a 32-foot power cable in one convenient package.
  • You can use a fountain tube up to 15.77″ in diameter, or reroute the water to another use.


  • A screwdriver is necessary for cleaning and maintenance.
  • To be avoided in ponds with excessive algal development.
  • No way to turn off ultraviolet light


SUN CPF-2500 Bio-Pressure Filter for Greek-Style Ponds

  • 1,600 GPH Filtered
  • Dimensions of the Pond: 1,600 Gallons
  • Stages of filtration two
  • Location External

Designed for exterior use, the SUN CPF-2500 Grech Pond Bio Pressure Filter has a flow rate of up to 1,600 gallons per hour.

The filter media used in its two stages of bio-mechanical filtration are included. It has a UV sterilizer already installed and its hose connections are simple to use.

Waterfalls and other water features can benefit from its ability to reroute water. Furthermore, this filter is constructed to provide sufficient pressure to transport water to more distant sites, such as taller waterfalls. It’s dimensions of 12″ by 16″ by 12″ make it ideal for use in contained water gardens.

Pumps are sold separately from this filter and are not included in the package. The hoses required to direct water to and from a pump or other water feature are not included. In addition, the UV light in this filter cannot be turned off, thus it is always on.


  • Allows for a pond up to 1,600 gallons in volume.
  • Including medium for biomechanical filtration
  • Incorporates a UV-C Light Sanitizer
  • Boosts pressure sufficiently to pump water to upper floors
  • The pump is small enough to conceal outside the pond.


  • Doesn’t come with a pump
  • Diversion hoses are not included.
  • No way to turn off ultraviolet light


The TotalPond UV Clarifier and Filter Set is a Full-Service Pond Maintenance System

  • Water Flow Rate, 560-1,300 Gallons Per Hour With Filter
  • A pond with a capacity of 1,200 square feet
  • Stages of filtration two
  • Location External

The bio-balls, coarse filter foam, and fine filter foam make up the two filtering stages of the TotalPond Complete Pond Filter with UV Clarifier.

When used in conjunction with a UV water clarifier, these filtration levels will ensure that algae never have a chance to flourish in your pond.

Waterfalls may be built taller because to the pressured nature of this filter. The constant force of the water prevents sediment and debris from sinking to the bottom of the pond.

This filter, measuring at 9.6″ x 16″ x 13″, is ideal for keeping ponds of up to 1,200 gallons clean and healthy.

You’ll need to buy a separate pump in addition to this filter. The filter may require an extension cord because its power cord is just 16 feet long. The hoses required to operate this filter are sold separately.


  • A pond up to 1,200 gallons in volume is possible there.
  • Containing bio-balls, coarse and fine filter foam, and other filtration components
  • Incorporates a UV-C Light Sanitizer
  • Boosts pressure sufficiently to pump water to upper floors
  • Prevents garbage from sinking to the bottom of the pond.


  • Doesn’t come with a pump
  • It has a short 16-foot power chord.
  • As an additional accessory, hoses are available for purchase.


Fish Pond Filter, Mechanical, Danner 02211 PM1000

  • GPH Filtered, 350-2,400
  • The size of the pond is one thousand gallons.
  • Three-Stage Filtration Process
  • Location Internal

To get you started, the Danner 02211 PM1000 Mechanical Pond Filter comes with a coarse filter foam and an activated carbon filter cartridge for its three-stage filtering system.

The flat design of this filter makes it ideal for use as a pond flooring material. It can accommodate a pond of up to 1,000 gallons and work with pumps that move between 350 and 2,400 gallons per hour.

The filter box can be easily removed from the pond’s base and carried to the top for cleaning and maintenance thanks to the integrated handle on its top. It has dimensions of 12″ by 12″ by 4″

However, the filter housing might be challenging to remove and there is no pump included. If the filter is clogged or the filter media has to be replaced, you will need to take the housing apart.

If you want to keep the filter working properly, you’ll need to change the activated carbon filter media that it uses.


  • Incorporating a Three-Stage Filtration Process
  • Contains all necessary filtering materials
  • Minimal in stature, it lies flat on the water’s surface near the bottom of the pond.
  • Holds enough water for a 1,000-gallon pond
  • Constructed with a convenient carry handle at the top


  • Doesn’t come with a pump
  • A challenging external housing removal
  • In order to do maintenance and cleaning, housing must be removed.
  • It is necessary to replace the activated carbon filter cartridge on a regular basis.


This is the Aquascape UltraKlean Biological Pressure Filter with UV Sterilizer

  • 2,700 GPH Filtered
  • Called a 2,000-gallon pond.
  • Stages of filtration two
  • Location External

If you have a pond larger than 2,000 gallons but need a filter, look no further than the Aquascape UltraKlean Biological Pressure Filter with UV Sterilizer.

Included in the package are bio-balls that filter out microorganisms and larger particles. The filter is topped with a UV steriliser and controls are conveniently placed for use.

The UV light is independently regulated from the pump and features its own on/off button. With the filter’s built-in backwash function, maintenance is a breeze.

No pump is included with this filter. While a kit is available that has a pump, it may not be the most economical choice. Hoses for attaching it to the pump are not included. Although bio-balls are included as filter media, they are not the most effective mechanical filtering medium.


  • Up to 2,000 gallons, so you may have a nice pond!
  • The filter medium is comprised of bio-balls.
  • Includes a UV light with a separate on/off switch
  • With the backwash function, cleaning is a breeze.


  • Doesn’t come with a pump
  • The required hoses are not included.
  • The most cost-effective pump is not included in the kit.
  • Bio-balls are the only filter medium provided.


Aquatic Biologically Intelligent Water Treatment System by OASE

  • 5,000, 10,000 GPH Filtered
  • Both 5,000 and 10,000 gallon ponds are available.
  • Stages of filtration two
  • Location External

The OASE BioSmart Pond Filter is an exterior, large-capacity filter that comes in two sizes, suitable for a 5,000- and a 10,000-gallon pond, respectively.

It has a UV lamp for sterilization and two different kinds of filter foam for coarse and fine filtering. This filter was designed specifically for ponds, so fish and amphibians shouldn’t have any problems using it.

An integrated sludge drain facilitates the disposal of bulky waste, while a cleaning indication and temperature monitor provide timely maintenance notices. The dimensions for the 5,000-gallon pump are 23 inches by 16 inches by 19 inches, while the 10,000-gallon pump is 31 inches by 23 inches by 18 inches.

Unfortunately, the pump and connecting hoses required to use this filter are not included. The filter intake’s connection is too easily broken; a more permanent solution is probably necessary.

The O-ring doesn’t fit correctly, according to several users. Unfortunately, most people will have difficulty installing this filter due to the low quality and lack of depth in the accompanying instructions.


  • Sufficient for ponds of 5,000 or 10,000 gallons
  • Filter foam, both coarse and fine, is included.
  • Powered by a UV light for sanitizing
  • Designed for water bodies that already contain wildlife.
  • Reduced effort required for cleanup thanks to sludge drain
  • There is a built-in cleaning prompt and temperature gauge.


  • Doesn’t come with a pump
  • The required hoses are not included.
  • The filter intake fitting is cheap and often comes loose.
  • The O-ring might not be the right size.
  • Because of the bad instructions, assembly is a hassle.


Introducing the Jebao Easy Clean Bio-Pressure CF-10 UV Sterilizer Pond Filter

  • Depending on the size of the filter, the gallons per hour ranges from 250 to 1,000.
  • Capacity of Pond: 500-1, 000 gallons
  • Stages of Filtration Two-stage
  • Location External

Using bio-balls and filter media foam, the Jebao Easy Clean Bio-Pressure CF-10 UV Sterilizer Pond Filter performs chemical and mechanical filtering.

With its UV light and two-stage filtering system, it achieves remarkable efficiency. It’s suitable for a 1,000-gallon pond with light bioload fish, or a 500-gallon pond with strong bioload fish like koi.

Backwashing and a cleaning indicator help to reduce the frequency with which the filter must be removed from its housing for servicing. It has dimensions of 15″ x 8″ x 8.75″.

There is no pump or hoses with this filter. Changing the flow rate requires either removing or repositioning the filter foam. There is no way to regulate the flow otherwise.

For this filter to do its job, internal pressure must be built up. It is possible that the latches will release if the power is cut off, as the pressure would drop. As a result, the pond water may seep from the filter rather than being recirculated when the power is restored.


  • Holds 500-1,000 gallon ponds
  • Including a filter foam and bio-balls.
  • The UV lamp is included.
  • Features a backwash function and a cleaning prompt.


  • Doesn’t come with a pump
  • The required hoses are not included.
  • Changing the flow rate requires physically repositioning or changing filter foam.
  • When pressure is removed, latches may open.
  • In the event of a power failure, water may seep instead of being pumped back to the pond.

Author Image

Dr. Barry Buttler

Dr. Barry Buttler, DVM, MS, DACVIM, is an experienced veterinarian who specializes in the care of small animals, specifically dogs. Dr. Barry K. Buttler is a member of the American Veterinary Medical Association and holds multiple certifications in small animal emergency medicine and geriatric pet health.

Veterinarian (DVM) Dr. Barry Buttler


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