Best Koi Pond Filter System Reviews

When you’re creating and maintaining your own Koi pond, you can’t just use the same things you would with every other type of fish pond. Koi fish have weaker immune systems than other fish, so it’s important for you to get the best Koi pond filter system you can to avoid any trouble with your collection. After all, these fish can be very expensive!

Best Koi Pond Filter System Reviews

Benefits of The Koi Pond Filter System

If you get the right filter system for your pond, you could experience these benefits:

Clear Water

There’s no use in spending so much money and time maintaining your fish pond if you can’t even see the fish inside. Installing the right filter will keep the water clear, so you and any guests will be able to enjoy the beautiful Koi swimming around in your pond.

Healthy Fish

Like I already said, Koi fish tend to have weaker immune systems than other types of fish, because they are bred together so many times to get the right color patterns. Sacrificing immune strength for beautiful fish means you need to get a filter that will help to protect the fish from biological threats in the water. A good Koi pond filter will be very effective as a biological filter, not just a mechanical filter for particles.

Clean Environment

Having clear water and healthy fish are great things, but you can also count on a good filter making the whole environment of the pond very clean and attractive. No more gunk and debris around the pond, but a neat and tidy underwater home for your fish to enjoy.

Top 5 Koi Pond Filter System Reviews Comparison Table

Product Name

Image

Filtration Type

Feed Type

Filter Capacity (With Koi Fish)

UV Sterilization?

Above Ground or Under Water Above Ground

Our Rating

Sun Grech CPF Pond Filter

Grech CPF-2500 Pond Bio Pressure Filter UVC 13-watt Up to 1600 Gallons

Biological and Mechanical

Pressure

Up to 900 gallons

No

Above Ground

#1
Editor Choice

Goplus® Pond Filter

Goplus Pond Pressure Bio Filter 4000GAL W/ 13W UV Sterilizer Light 10000L Koi Water

Biological

Pressure

1500-2500 gallons

Yes

Above Ground

#2

OASE BioSmart 5000 Pond Filter

OASE BioSmart 5000 Pond Filter

Biological

Gravity

Up to 1000 gallons

No

Above Ground

#3

Laguna Pressure-Flo 3200 Filter

Laguna Pressure-Flo 3200 UVC Filter

Biological and Mechanical

Pressure

Up to 1560 gallons

Yes

Above Ground

#4

TetraPond Clear Choice Filter

TetraPond Clear Choice Biofilter PF1

Biological and Mechanical

Gravity

Up to 500 gallons

No

Above Ground

#5

How to Choose The Koi Filter

To get the best Koi pond filter system, you can just go and buy anything and hope it works. It’s a good idea to look at system reviews (like the table above), and to know what you need ahead of time. With that in mind, here are the features to look at:

Filtration Type

For Koi to live a healthy life, there should be both mechanical and biological filtration, although biological filtration is arguably the most important type. You can get both of these by using two separate filters, a filter pump with an external filter, or a filter that incorporates both filtration types. At a bare minimum, it’s best to have a filter that has an effective biological filtration system, because this is what will help to keep your fish healthiest.

Keep in mind that biological filters aren’t as effective against particles and debris, so they won’t be able to filter out the organic materials expelled from a chipper shredder, lawnmower, weed eater, or any other lawncare devices when you do your regular landscaping maintenance.

Filter Capacity

Not all filters can handle every size of pond. Ideally, the filter will be able to completely turn over the water of your pond every few hours. This means you need to choose a filter that’s compatible with your pond size and fish load. The heavier the fish load, the stronger the filter will need to be. For example, if the filter is rated at 5000 gallons without fish, it might work for a pond of about 500-1000 gallons with a normal fish load.

All of this is because fish produce a lot of waste. Koi fish are especially bad when it comes with waste, because they excrete a lot of ammonia as well as solid waste. This means Koi ponds usually need even more powerful filters than regular fish ponds.

Feed Type

No, this doesn’t mean “feed” as in feeding your fish, it is referring to how the water will get back into the fish pond. Filters can be pressure or gravity fed. Pressure fed filters use a pump to forcefully push the water back into the pond, meaning you can place them anywhere outside of the water and still expect them to work well. You could even place them 50 feet away and use a garden hose to get the water around. (But, I wouldn’t recommend this.)

Gravity feed filters send water back using just the force of gravity, so there is no secondary pump used for pushing water. These filters need to be placed higher than the pond water level, so that filtered water can easily flow back into the pond.

UV Sterilization

If you want clearer water, a UV sterilizer is a great addition to your filter. It uses powerful UV lights to clarify the water by bunching up algae bits together, so they can be caught in the filters more easily.

Above Ground or Under Water

This feature has to do with where you will install your filter. Some filters are submersible, although this is not very common for Koi pond filters. Most are installed above the ground externally, making them easier to clean and access when necessary. This is a great feature for convenience, because filters can get dirty and need replacement or cleaning every month or so in most ponds.

If bugs are a problem in your area, you should protect your above ground filter with a cover and make sure it’s sealed against mosquitos. Otherwise, you might need to break out the mosquito fogger in the spring and summer!

Conclusion

Finding the Koi pond filter system is part of investing in your fantastic Koi pond. From the selections above, I would recommend Sun Grech CPF filter. It’s got both biological and mechanical filtration, making it effective against particles while maintaining quality water. You can maintain this pressure filter fairly easily, so it’s good if you don’t want to spend too much time doing your maintenance every time.

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Dianne T. Lampe
 

Hi there, I’m Dianne! Welcome to a one-stop shop for your gardening needs. We aim here to offer up a very wide range of information about many aspects of gardening. From flowers and planting through to vegetables and accessories, find all the information you need here. We have a true passion for everything green. We’re highly motivated to develop this site continuously and offer any insights we can alongside useful facts and handy hints. Please get in touch and let us know what you would like us to cover. Thoughts and feedback are always welcomed. Enjoy!

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