10 Best Pond Filters – [Reviews & Guide 2021]

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Choose the Best Pond Filters for Your Need

Best Koi Pond Filters and Pumps - Reviews & Guide

A pond filter can be a very useful thing to buy if you want to purify the water of your pond to maintain the environment of the water. For example, UV pond filters pass water through UV rays and eliminate harmful bacteria. It will be beneficial for the fish which you keep in the pond. There are also other types of water filtration. Let's proceed and find out what pond filters exist and which of them can be used in particular cases.

If you want to purchase the best filters for your pond, it is extremely important to have an idea about the size of the pond. You need to check whether the filter has the capacity to clean the amount of water that you have in the pond. You should also check the health of the water.

Some of the filters are capable of only doing mechanical cleaning. So, if you have problems with biological bacteria in your pond that water filter will not be perfect for you.

You should always go for those pond water filters that are energy efficient.

It should also have different layers of purification that will ensure that both bigger and smaller size debris can be cleaned from the pond.

The pond pump filter should be made of quality material so that you can use them for a longer time without changing its components.

The technology of cleaning should be perfect so that it can clean the water quickly.

Cleaning the filter can be another headache. So, you should purchase those filters only with which maintenance will not be a problem.

  1. Best Pond Filter and Pump Kit: POND BOSS Filter Kit
  2. Best to Remove Algae: TetraPond Clear Choice Biofilter PF-1
  3. Best without UV: TetraPond Filtration Fountain Kit
  4. Best for 1000 Gallons: Polar Aurora 4000 Gallons Pond Pressure Bio Filter
  5. Best without Fish Filter: TetraPond Submersible Flat Box Filter
  6. Best for Koi: Jebao CF-10 Pond Bio Filter
  7. Best without Pump: Grech CPF-2500 Pond Bio Pressure Filter
  8. Best Filter and Waterfall: TetraPond 26596 Waterfall Filter
  9. Best with Plants: XtremepowerUS Koi Pond Bio Filter
  10. Best with UV Clarifier: Best Choice Products 4000L Pressure Bio Filter

How Pond Filter Works?

A pond filter simply uses the nitrogen cycle to purify the water for your pond. Plants as we know removes some nitrate from the pond water.  Filtration systems or pond filters are a necessary tool used in the caring of plants, water, and fish in your pond.  The work of the pond filter is to control the nitrogen cycle in the pond. The nitrogen cycle takes fish producing which is very toxic and then oxidizes them into a positive nitrate. Technically, the plants will absorb then make use of the nitrate that’s left behind. They also add oxygen to the water in the pond too. If the conditions are kept the same, the process goes on indefinitely.  In a pond setting without a pond filtration system, the ammonia produced by the fish would accumulate until it has reached a toxic level which is dangerous to your environment.  If the pond is also overpopulated, there will also be a higher amount of ammonia.

All filters used for koi fishes are not built to be the same and each filtration system would either get worse or better for the type of pond you have. In the next segment, we will take a closer look at some of the most important features you need to look out for that will best work for your pond and you.

Filtration Stages

 Each pond filter can be divided into two parts – mechanical and biological filtration.  These two stages of filtration are known to be different when it comes to the operation but they are both required and important ensuring your pond is kept neat.

Biological Filtration

Biological filtration is a type of situation that involves altering biological waste products like ammonia to keep the water chemistry at a safe level while also killing off microbes that are found in your pond.  When it comes to biological filtration, this stage makes use of a media substrate that helps the growth of healthy micro-organism in the filter.   These microbes as well convert ammonia which the pond produces as waste into nitrates that then can be used by the plants in your pond. Maintaining a biological filter with beneficial bacteria all the time can lead to colonizing the substrates as well as the rocks which can be found in your pond via microbes that change ammonia.

Another stage of biological filtration involves ultraviolet light to kill all unwanted microbes which involve bacteria and parasites that can spread diseases through your pond.

When the filtration system involves a UV light system, know that the effectiveness of the UV requires that the water flowing into your pond doesn’t pass through the filtration system very quickly or the pond water doesn't come out as “too silty” – the longer the water in your pond is exposed to UV light, the more effect it has during filtration.

Mechanical Filtration

Mechanical filtration is easier when compared to biological filtration but it is also an important factor you should not overlook. This stage of filtration uses a filter to remove or drive out unwanted particles, algae, and a big chunk of waste found in the pond.

Originally, Mechanical Filtration requires multiple layers of mechanical filters which vary in shapes and sizes so that filtration can go on smoothly without any hassle.

Pond Filter Types

Best Koi Pond Filters and Pumps - Reviews & Guide

Generally, there are five types of pond filters available on the market.

  • In pond pre-filters
  • Skimmers
  • Pressure Filters
  • Waterfall filters
  • UV Sterilizers

Some of them have only mechanical or biological purification processes. Some others have a combination of the two. So, as per your own requirement, you can choose the best one for you.

In Pond Pre-filters:

 It can be used for small ponds.  It does mainly mechanical filtration. Ponds with a heavy stock of fish should not be cleaned with such filters.


 This can be used for ponds of any size.  It can do both mechanical and biological filtration of a pond. However, for a heavy amount of biological filtration you may need to add an extra-biological filtration kit with it. It helps to collect the bigger size debris on the surface of the pond.

Pressure Filters:

 It is best for medium or small size ponds.  This pond pump filter is a mechanical filter. It can be used along with skimmers. This kind of filter is capable of purifying small debris.

Waterfall filters:

This type of filter can be used for a pond of any size. However, it is best for the medium and the small size of the pond.  Biological filtration is done just the best with such filters. 

UV Sterilizers:

It can be used to clean the green water from medium-sized and small ponds. It can also clean waterborne bacteria and viruses.  If you have a pond with many fish, then this device can come extremely helpful. 

Best Value for Money
POND BOSS Filter Kit with Pump review
  • Pond Size (Gallon): Up to 500
  • Flow Rate (GPH): 320
  • UV Clarifier: No
  • Filtration Stages: Biological and mechanical

Key Features and My Experience

The POND BOSS Filter Kit with Pump includes an  eco-friendly water kits such as the pump and the nozzle which is quiet, energy-efficient and it is good for the environment.  If you want to purchase a pond filter and at the same time, you want to save money rather than buying a nozzle, filter, and pump, consider purchasing this product.

Mechanical filtration comes in two parts: one does the job of capturing small or minute particles while the other one does the job of capturing large particles. This filter kit also includes Bio Balls to provide better growth of beneficial bacteria.

Users can increase the life of this product using pads and a system of the sloping lid to reduce the maintenance it has to undergo.  The POND BOSS is very easy to install and you can get it up and running in a few minutes. 

Johnny Hunt

My Overall Impression

This pond filter kit is an eco-friendly option that is very effective and smooth during operation. This innovative garden product lets its users enhance their pond area, promoting cleanliness. This pond filter specializes in innovative and energy-efficient water gardening products so it can help you enhance and maintain your ponds. I totally recommend this product.

  • The system undergoes both biological and mechanical filtration.
  • The fountain is excellent for water aeration.
  • Provides you with spotless clean water.
  • The product is worth the price.
  • The pads and sloping lid are designed to improve maintenance.
  • It occurs that this product is very lightweight and it has to be weighed down.

Best to Remove Algae
TetraPond Clear Choice Biofilter PF-1 For Efficient Filtration review
  • Pond Size (Gallon): Up to 1200
  • Flow Rate (GPH): 325 to 550
  • UV Clarifier: No
  • Filtration Stages: Biological and mechanical

Key Features and My Experience

TetraPond Clear Choice Biofilter PF-1 possesses all the great features you can find in any pond filter.  The product’s quality mechanism makes the TetraPond Clear Choice Biofilter PF-1 For Efficient Filtration easier to clean due to the presence of the backflush valve.  This product uses both biological and mechanical filtration systems to clean and filter the water found inside your pond. It also integrates an Ultraviolet light system that kills off algae in your pond.

 This filtration gets rid of impurities and waste without much hassle and it can handle up to 1200 gallons capacity.  This makes it a perfect product that users can use on their pond consistently.

Johnny Hunt

My Overall Impression

The main problem with the TetraPond Clear Choice Biofilter PF-1 For Efficient Filtration is that it doesn't come with specific instructions or manuals especially when it comes to the backflush valve. New users would find it really hard because of this issue. If you do not care about the stress or you want more adventure, you can go for this pond filter.

  • It has both mechanical and biological filtration.
  • It integrates UV light for clarification.
  • It has a bio-active filter that provides unrestricted water flow.
  • It seems durable.
  • It is affordable.
  • The backflush filter is a weak spot of the product.
  • It should be backflush every week which can be very stressful for users.
Knowledge Block
Knowledge Block
Bio balls for pond filter
Bio Balls is the solution to biological filtration instead of using the classic traditional stones which are porous in nature. Bio balls are more effective and they are also lighter compared to the former mode of filtration. These products take the shape of your filter box lasting for a lifetime. When it comes to cleaning, they are easier to clean too. A box contains up to 200 balls and they can go as far as filtering 1000 gallons of water with the least load of fishes.

Best without UV
TetraPond Filtration Fountain Kit review
  • Pond Size (Gallon): 75 to 250
  • Flow Rate (GPH): 325
  • UV Clarifier: No
  • Filtration Stages: Mechanical

Key Features and My Experience

The TetraPond Filtration Fountain Kit is a pond filter that boasts of using both fine and coarse pads for a submersible pump. It also offers mechanical filtration for its customers. This product is famous for setting up a fountainhead that can give users three different shapes while using a swivel adjuster and a diverter valve to level the head of the fountain.

A switch is present to control the width of flow as the fountain can provide flow rates of up to 325 gallons every hour.  The flow rate of this product is also continent for ponds that require about 250 gallons as you can choose a variety of choices available. 

Johnny Hunt

My Overall Impression

This product is prominently used on smaller types of ponds to keep your structure clean and it also comes with three fountain heads. The filter is submersible, therefore it helps to remove pump and fountain clogging. This TetraPond kit also aids in the promotion of water aeration in your pond. I recommend it.

  • Three fountain heads give three flow options to users.
  • This product comes with all the required parts and components of the pump filter.
  • This filter aids in developing a variety of ponds.
  • It is easy to install once it is assembled.
  • It is a very effective filter.
  • Assembling can be hard.
  • When in use, the filter box results in floating.
Best for 1000 Gallons
Polar Aurora 4000 Gallons Pond Pressure Bio Filter review
  • Pond Size (Gallon): 75 to 250
  • Flow Rate (GPH): 325
  • UV Clarifier: No
  • Filtration Stages: Mechanical

Key Features and My Experience

The Polar Aurora Pond Filter is a suitable choice for relatively inexperienced fish farmers.  This pressure filter comes with an Ultraviolet lighting system that allows users to control the development of algae in the pond.  The ultraviolet light does not only get rid of impure elements but also ensures that the fish found in your pond live longer than normal.

The Polar Aurora Pressure Bio Filter has a tough casing on its exterior. This allows customers to place the pond filter underground, near the pond, or above it.  For more versatility, the automatic cleaning function is added and this has the ability to handle up to 2,500 gallons of water. 

Johnny Hunt

My Overall Impression

The Polar Aurora 4000 Gallons Pond Filter is a great product to purchase, especially if you are an inexperienced fish farmer. However, the manual seems too difficult to understand by users making it challenging to set up. In as much as that is the case, this filtration kit provides its users with all the necessary specifications needed to clean their pond.

  • It comes with an integrated UV bulb system.
  • It is durable.
  • It has a sturdy casing.
  • It has the ability to filter up to 2,500 gallons at a go.
  • It can be placed underground or above or near the pool.
  • The instructions that come with this filter are not clear.

Best for 1000 Gallons
TetraPond Submersible Flat Box Filter For Ponds Up To 500 Gallons review
  • Pond Size (Gallon): Up to 4000
  • UV Clarifier: Yes
  • Filtration Stages: Biological

Key Features and My Experience

Just as the name implies, the TetraPond Submersible Flat Box Filter For ponds offers mechanical filtration of fine and coarse particles for ponds that contain up to 500 gallons. This pond filter shaped like a box also comes with sufficient room in which users can add biofilters.  The filter is perfect for flow rates between 200 – 2000 gallons of water per hour and it works just fine too. 

Users can easily detach filters from the tubing to remove unwanted waste particles from the system during cleaning.

Johnny Hunt

My Overall Impression

The TetraPond Submersible Flat Box Filter For ponds is a pond filter that focuses mainly on mechanical filtration but there is a space in which biological filtration can be integrated. It can handle ponds that are above 500 gallons and it has an impressive flow rate from 200 gallons per hour to 2,000 gallons per hour. I totally recommend this product.

  • It can handle flow rates of up to 200 gallons to 2000 gallons per hour.
  • There is enough space in the case for Biological filtration.
  • It is made to be durable.
  • It helps clean your pond while stopping unwanted waste material from getting into it.
  • The filter can fit a vast number of ponds.
  • This filter offers only mechanical filtration.
  • Users need to submerge this filter with rocks to avoid it from floating.
Knowledge Block
Knowledge Block
Pond filter media
A pond filter media is a product designed and constructed to maintain and improve the performance of your filter hence, keeping your pond as professional and clean as possible. A pond filter media is also used to achieve a better chemical, biological, or chemical filtration in all types of filters which you can get your hands on.
Best for Koi
Jebao CF-10 Pressured Pond Bio Filter review
  • Pond Size (Gallon): 850 to 1250
  • UV Clarifier: Yes
  • Filtration Stages: Biological and mechanical

Key Features and My Experience

The Jebao CF-10 Pressured Pond Bio Filter is a natural pond filter that one has to check out. It comes with an integrated 13-watt UVC, a cleaning indicator, a UVC vowing window, and a backwash facility. This filtration system uses both biological and mechanical stages which are very important to your pond.  The Jebao CF-10 Pressured Pond Bio Filter can filter as much as 1,500 gallons if there are only plants in the pond, 1,000 gallons if there are plants with very few small fish, and 500 gallons if you own a pond that contains a large fish such as koi. 

To improve its performance, the manufacturer used quartz glass in its filtration system.  While normal glasses can reduce ultraviolet rays by up to 90%, the quartz glass makes sure that most of the light reaches the deeper part of the pond.  There is an indicator, which goes in hand with the well-designed purification system which is used to signal the need for cleaning up.

Johnny Hunt

My Overall Impression

If you are interested in getting a high-tech filtration system, the Jebao CF-10 Pressured Pond Bio Filter is the best choice for you out there. It uses a special Ultraviolet penetration quartz glass to maximize Ultraviolet efficiency. The UV lamp in turn helps remove algae and bacterial from your pond while providing you a healthy and encouraging environment.

  • It undergoes both stages of filtration; mechanical and biological.
  • It can filter up to 12,000 liters while holding fish.
  • It is a very durable product.
  • An indicator light shows when cleaning is required.
  • It is very easy to set up.
  • It has a great backwash feature.
  • The quality of the material seems too cheap.
  • May have defects in its construction.
Best without Pump
Grech CPF-2500 Pond Bio Pressure Filter UVC 13-watt Up to 1600 Gallons review
  • Pond Size (Gallon): Up to 2500
  • Flow Rate (GPH): 1600
  • UV Clarifier: Yes
  • Filtration Stages: Biological and mechanical

Key Features and My Experience

When you hear about Grech CPF-2500 Pond Bio Pressure Filter, what should go through your mind is a pond filter that has great potential while being very easy to maintain and clean.  Unlike other filter products, the Grech CPF-2500 simplified cleaning with the help of numerous methods of filtration and a quick handle cleaning system.  This filtration system uses both biological and mechanical filtration chambers that help in extra filtration.

The filter acts as a catalyst to produce bacterial that can remove nitrate and ammonia in the pond. When these impurities are removed, the fish in the pond can enjoy clean and clear water. The Grech CPF-2500 Pond Bio Pressure Filter can clean up to 900 gallons of water with a reasonable number of fishes and plants in it. This product can handle up to 1,600 gallons of water in a pond. The filter does not come with its own pump and you have to pay extra to get one.

Johnny Hunt

My Overall Impression

The Grech CPF-2500 Pond Bio Pressure Filter simplifies cleaning with the help of numerous methods of filtration and a quick handle cleaning system. The filter product does not include a pump system. This means that you have to spend extra cash to purchase it for your filtration kit. If you want a product that you can use right away, I do not recommend that you use this filter. However, this product is still a great one with all the specifications found on it.

  • This filter is very functional.
  • Integrates a dual filtration system.
  • Incorporated with a rapid cleaning system.
  • It is very easy to maintain and clean.
  • It makes use of an Ultraviolet bulb for cleaning.
  • The pump must be purchased separately.
Best Filter and Waterfall
TetraPond 26596 Waterfall Filter review
  • Pond Size (Gallon): Up to 1000
  • Flow Rate (GPH): 500 to 4500
  • UV Clarifier: No
  • Filtration Stages: Biological and mechanical

Key Features and My Experience

This pond filter attaches itself to an external pump or a submersible which helps in the formation of a 12” waterfall which is enough for ponds that are not more than 1,000 gallons. In as much as the media which provides biological filtration does not come with the package, the TetraPond 26596 Waterfall Filter does offer both types of filtration with ease.

Both types of filtration can assist positively when it comes to improving the nitrogen cycle of your decorative pond. As beneficial bacteria colonize in both filtration systems, it turns toxic nitrates which are harmful to organic life into nitrates that nourish the environment.  The pumps of this filter can handle flow rates from about 500 gallons to about 4,500 gallons per minute and the waterfall provides the pond with an attractive view.  The TetraPond 26596 Waterfall Filter however provides aeration of water to your pond giving it clean and clear water.

Johnny Hunt

My Overall Impression

The TetraPond 26596 Waterfall Filter helps you choose between bio-activators or lava rocks, both of which can be purchased differently from the main package. Although bio-activator is more common today, lava rocks still act as a traditional choice which would give you one of the best filtration experiences your pond would ever have. I totally recommend this product.

  • The waterfall boosts aeration in the pond.
  • It has both mechanical and biological filtration systems.
  • It uses bio-activators or lava rocks for biological filtration.
  • It is a durable product.
  • You need to buy the media for biological filtration separately.
  • You may find it hard connecting standard size tubing to filter.
Best with Plants
XtremepowerUS Koi Pressure Boi Filter Pond Garden Pond Pump Filter review
  • Pond Size (Gallon): Up to 4000
  • UV Clarifier: Yes
  • Filtration Stages: Biological

Key Features and My Experience

The XtremepowerUS Koi Pressure Boi Filter is really a powerful filter.  This filter boasts of filtering at the rate of 10,000 liters per hour and it is very efficient for ponds that contain up to 1,500 gallons of water.  This pond filter has 3 layers of sponges that provide a perfect environment and conditions for good bacteria to thrive.

The XtremepowerUS Koi Pressure Boi Filter has 3 different connections: 1½”, 1¼”, and ¾”. It also packs a UV light (13 watts) which helps to break up algae colonies so users don’t have to worry about those bad impurities. The cord of this pond filter is only 15 feet long but this makes setting up easier.

Johnny Hunt

My Overall Impression

All I can say about the XtremepowerUS Koi Pressure Boi Filter is that it is a powerful pond filter that can handle an average pond. It boasts of a filtration system that can handle about 10,000 liters of water per hour, making it a perfect choice for large ponds. Although as tough as it can be resembling after cleaning, it is still a great product.

  • It has a UV light system.
  • Includes multiple attachments.
  • It can filter up to 10,000 liters per hour.
  • Features a long 15 ft power cord for an easy starting.
  • It is very durable.
  • Re-assembling can be very tough after cleaning.
  • The UV replacement bulbs can be hard to get.

Best with Plants
Best Choice Products 4000L Pressure Bio Filter for Pond review
  • Pond Size (Gallon): 1500 to 2500
  • Flow Rate (GPH): 4000
  • UV Clarifier: Yes
  • Filtration Stages: Biological

Key Features and My Experience

Best Choice Products or otherwise known as BCP for short is definitely one which is more likely brand to appear on this list. Best Choice Products was founded about 10 years ago and they started small by selling a pool table at a second-hand price. Now that we have gotten that out of the books, the BCP has its ups and downs, and the features which this biofilter packs can be compared to most products on this list. When it comes to choosing the BCP, this is an excellent choice when it is used as a pond filter for koi fish. This is a result of a combination of its cleaning capacity and the flow rate that the BCP product can use.

The flow rates can reach up to 4,000 gallons per hour which makes it one of the fastest devices I have come across. Also, this filter can handle low rates of up to 2,500 gallons per hour. The Best Choice Products 4000L Pressure Bio Filter for Pond is a pond filter that is medium-sized and it is specifically designed for koi fish that actually do better at 1-½ meters deep.
Johnny Hunt

My Overall Impression

The Best Choice Products 4000L Pressure Bio Filter for Pond is a biological filter system that would help filter and protect your pond from waste and harmful unwanted materials. Although there are inconveniences during cleaning and maintaining, it is still a great product to purchase or go for. I love how it can filter a large flow of water without breaking down. I totally recommend this product.

  • It adapts to an amazing flow rate.
  • It is affordable.
  • It has a UV clarifier.
  • It has a long cord for easy setup.
  • It has multiple attachments.
  • It can filter 12,000 liters per hour.
  • It is very hard to maintain.
  • electronics found in this filter do not last long.

Comparison Table

POND BOSS Filter KitUp to 500320NoBiological and mechanical
TetraPond Clear Choice Biofilter PF-1
Up to 1200325 to 550NoBiological and mechanical
TetraPond Filtration Fountain Kit75 to 250325
Polar Aurora 4000 Gallons Pond Pressure Bio FilterUp to 4000-YesBiological
TetraPond Submersible Flat Box FilterUp to 500200 to 2000No-
Jebao CF-10 Pond Bio Filter850 to 1250-YesBiological and mechanical
Grech CPF-2500 Pond Bio Pressure FilterUp to 25001600

YesBiological and mechanical
TetraPond 26596 Waterfall FilterUp to 1000500 to 4500NoBiological and mechanical
XtremepowerUS Koi Pond Bio FilterUp to 4000-YesBiological
Best Choice Products 4000L Pressure Bio Filter1500 to 2500

Benefits of a Pond filter

The pond filter system is mainly required for those ponds where you have kept fish, turtles, or other water animals. It mainly helps in keeping the water of the pond clean so that the creatures you have kept in the pond can stay safe.

  • A pond filter adds beneficial bacteria to a pond. These bacteria destroy the invisible toxins in the water. These bacteria break down the Nitrite and Ammonia in the water. It transforms Nitrite into Nitrate. This nitrate can be absorbed by the plants in the pond. The environment of the pond is improved, and it is good for the fish you have kept in the pond.
  • The skimmers can help in cleaning the larger debris on the surface of the water. It collects such kind of debris and then helps it for easy removal. So, this larger-size debris doesn’t get a chance to sink down and become decomposed.
  • A pressure filter can help a lot to remove the green algae from the water. It makes the water crystal clean that is just the best for the health of the fish inside the pond.
  • With the help of UV sterilizers, even the smallest particles inside the pond can be removed. Thus, the water will become crystal clear. The water will be so clear you can see fish inside the water. It increases the beauty of the pond.

Features of a Pond Filter

Best Koi Pond Filters and Pumps - Reviews & Guide

  • It will depend on different types of pond filters. UV pond filters have UV sterilizers that have the ability to work down to the microscopic level by cleaning the invisible biological toxins of the water.
  • It can have adjustable fountain heads. Some of the pond water filters will also have a magnetic drive.
  • The bottom drainage feature can ensure the removal of the debris that falls to the deepest level of the pond. This feature will not allow the debris to be decomposed at that low level.
  • Most of the quality pond water filters will have easy maintenance features. The components of the pond filter can be easily removed. At the time, the installation should not take too much time. It will also help in cleaning the water filter easily.
  • The back-wash feature is also a crucial feature in the pond water filter. This feature will help in removing the collected debris from the pond easily.
  • The presence of mechanical sponges will help in purifying the small components present in the pond water.

How to Know the Ideal Size?

Tanks Without Fish

To get the correct size of a rectangular or square tank, without any fish or water in it, you can use this formula:

Length x Breadth X Depth X 7.5 = Gallons of Water

When it comes to oval tanks or round-shape tanks, try measuring the diameter then divide it by two. The result is the radius of the tank and when that is done, you can calculate for size with this formula:

3.14 x Radius x Radius x Depth x 7.5 = Gallons of Water

If your tank has two depths, to get the size, you have to measure the two depths at separate dimensions. To get the average size of the two tanks, add all the measurements, and divide it by the number you measured the depth. The result would tell you the correct amount of water in gallons that make up the tank.

If the tank is irregularly shaped, you can get the size by gauging the width at a different place on the lid, then add them together and divide the answer by the number of times it took you to gauge the width of the tank. That answer is the size of the gallon you need to be filled up. You can also consider using this step if the tank has different depths.

For a Fish Tank with Water Alone

If you own a fountain or waterfall and you decide to use the filter on it, here are the things you’ll need to consider. There are measurements you need to look into:

  • The quantity of the tubing’s 90° bends, adapters, fittings, and valves
  • The dimension of the tubing
  • The width and length of your fountain or waterfall
 Having these would help you install and ensure the water is flowing well at a constant speed to be taken up. 
Users also need to know the breadth of the fountain or waterfall to know the speed. Also, pumps in waterfalls have to flow at least 125 gallons in one hour for every inch.

Maybe you are searching for a tranquil flow, I would advise that you stick to 100 gallons of water every hour. Below is the formula you can use to calculate it appropriately:

Gallons of Water Moved Per Hour X Inches of Breadth = Flow Rate

If you want to know the total dynamic head pressure, you can make use of this formula:

H = Height (in ft) T = The distance of tubing (in ft); A = The cumulative number of 90° angle bends, B = The number of all the adapters or bulkheads used with the tubing; H + (T/10) + (A/2) + (B/4) = The Tallied Head Pressure
For Tanks or Pools with Fishes

Just like that of the empty tank, you can't find the real way to get the size of the sifter which is sufficient for a container with a fish load.

However, users can start by selecting sizes that can function with 5 inches of fish for every 5 gallons. You should also have it in mind that the fish in your tank would grow up and lay eggs so you have to choose a size that will contain them when all that is done.

Let's do it like this, if you have a pond or tank of 1000 gallons, with about 150 small fishes inside, you can get a container that is bigger by just 1.5%.

If you find that hard to do, just purchase large-sized tanks and prepare for them to multiply.


When to clean pond filter?
Pond filter needs to be cleaned very often. Biological filters need to be cleaned every year during the spring or fall while mechanical pond filters on the other hand need to be maintained on a weekly basis.
What pond filter do I need?
The standard required by professionals is that you should have a filter that is rated about 1.5 times the number of gallons found in your pump. So if you have a pond that contains about 400 gallons of water, 1.5 x 400 means that you need a filter that is rated at more than 600 gallons per hour. The flow rate of all pond filters is measured in gph.
What is pond filter media?
Pond filter media is the material found within the filters that your fish pond’s water is pumped through. As water passes through a pond filter media, the material removes unwanted algae and debris from your pond system. It can also act as a home or a sanctuary for bacteria in your pond.
Can a pond filter be too big?
Surprisingly, No. You can’t have a pond filter that is too big for your pond rather larger pond filters have more surface area and they do not require to be cleaned as much as smaller filters so that’s less work for you.
Which pond filter system is best?
With all the products that qualify to be amongst the top pond filters in the market, the best system is certainly the POND BOSS Filter Kit with Pump. But inasmuch as that is the best choice on the list, the best pond filter system depends entirely on your specific needs.


If you are a lover of keeping fish and other water animals in your pond or water garden, then you need to ensure that the water of that pond remains safe and healthy. Using a pond water filter can provide you with the best quality water.

You should check the size of the pond, the volume of water to be purified, and the number of fish or other water animals to ensure you buy the best pond water filter.

By choosing the best Pond filter system, you will be able to keep the pond crystal clear. It will not only help you to keep the fish, turtles, or other creatures healthy, but the visibility of the pond will make it much more beautiful. You will be able to see the fish playing in the water. Choose the best pond water filter that has both the features of mechanical and biological filtration.

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