Best Filter For Flowerhorns: Top 5 | Aquascape Addiction

Best Filter For Flowerhorns: Top 5

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Need help finding the best filter for flowerhorn fish? we cover our top 5 picks in detail to help you decide on the right option for you and your fish

Best Filter For Flowerhorns: Top 5

Flowerhorns are some really neat fish indeed. Just like all other aquariums with fish, you are going to need a really good filter to keep the water clean and the fish healthy.

Finding the right filter can be a bit of a challenge no doubt, but that is why we are here today. Let’s get right to it and talk about what might the best filter for Flowerhorns (this one is our top pick).

Fluval 406 Our Top Pick 9.5/10
AquaClear 110 Hang on back 9.1/10
EHEIM Classic Up to 92 gallons 8.6/10

What Kind Of Filter Does A Flowerhorn Need?

When it comes to Flowerhorns and water filtration units, there are a few things that you need to keep in mind. First off, these guys eat a whole lot of food and therefore produce a ton of waste. They do make the water really dirty and this means that they require a really powerful and efficient filter. As a rule of thumb, if you have your Flowerhorns in a 50 gallon tank, you will want to invest in a filter rated for a 100 gallon tank.

The filter should be able to handle twice as much water as is in the tank at the very minimum. Flowerhorns produce a lot of waste so this is definitely necessary. Furthermore, even though these fish are said to be very hardy and resilient, they still can’t deal with too much ammonia or other impurities in the water, so having a filter that engages in all 3 major types of filtration is also a necessary thing. Finally, Flowerhorns are not big on having their space taken up, so getting some kind of external filter is also a must have.

What We Think Is The Best Filter For A Flowerhorn Fish

Now that we know what kind of filter a Flowerhorn needs, let’s first take a look at our top pick;

Fluval 406 Canister Filter

This is an ideal choice to go with if you have a Flowerhorn for several different reasons. First off, the Fluval 406 can be used for any aquariums up to 100 gallons in size and can process around 383 gallons of water per hour. It’s a really strong and efficient filter that can be used for some fairly large aquariums. It’s a great option for smaller Flowerhorn tanks that require a whole lot of filtration (you can see more info and pricing here).

This is actually a 3 stage filtration system with mechanical, biological, and chemical filtration included. What is really neat is there is ample room for various filter media, so you can actually customize the amount and types of media you have inside of the canister. It can actually hold around 30% more media than other canister filters of a similar size. Simply put in the media, attach the proper tubing, and use the self-priming mechanism to get the Fluval 406 running.

The Fluval 406 is really easy to turn on, it is easy to mount and install, and using it is a breeze. It does run fairly quietly thanks to the sound dampening impeller, which is surprising seeing how efficient and powerful it is. It also comes with an Aquastop valve and an intake strainer to prevent clogs from occurring. Finally, the easy to connect hoses and easy off lid on the Fluval 406 make it easy to maintain.


  • Works for some really big aquariums.
  • High water flow/filtration rate.
  • Fairly quiet.
  • Strainer to prevent clogs.
  • Easy to maintain.
  • 3 stages of filtration.
  • Customizable media trays.
  • Holds a large amount of media.
  • Easy to mount and install.
  • Easy off lid for maintenance.


  • May leak slightly after prolonged use.
  • May develop a clicking noise.

You can buy the Fluval 406 at Amazon here

4 Other Options We Also Like: Reviews

In case you are not a huge fan of our first choice for whatever reason, you can always take a look at any of these other 4 great filters for Flowerhorns.

1. Aquaclear 110 Power Filter

This hang on back filter is another great choice to go with. It is defintiely quite convenient seeing as you can just hang it on the back of your aquarium. It does not take up space inside of the tank, nor do you need extra shelf space for a big canister either. Mounting the Aquaclear 110 is as easy as placing it over the edge of the aquarium.

The Aquaclear 110 is meant for aquariums up to 110 gallons in size, which is fairly large, so it could easily deal with a 50 or 60 gallon Flowerhorn tank. At the same time, it has the ability to process roughly 500 gallons of water per hour, which once again is quite impressive. What is pretty cool about this filter is that you can adjust the flow rate, and when the flow rate is slow, up to 50% of the water gets filtered multiple times for even cleaner water.

This is a classic 3 stage filter that brings you mechanical, biological, and chemical filtration all in one. It does a fantastic job at removing impurities of all sorts from the water so your Flowerhorn can be healthy and happy.

All of the filter media such as AquaClear foam, BioMax, Activated Carbon, and more, all come included in the package (more on filter media on this article). The Aquaclear 110 Power Filter is a highly efficient, powerful, and space saving filter perfect for any Flowerhorn tank.


  • Can filter large volumes with ease.
  • Awesome 3 stage filtration.
  • Very easy to mount.
  • Space saving.
  • Media comes included.
  • Adjustable flow rate.
  • High re-filtration rate for extra clean water.


  • Somewhat noisy.
  • Cleaning it is not the easiest.

You can buy the Aquaclear 110 at Amazon here

2. EHEIM Classic External Canister Filter

This particular option is rated for aquariums up to 92 gallons in size and can process a minimum of 300 gallons of water per hour. It can easily maintain great water quality in a 50 or 60 gallon Flowerhorn tank.

This is a very simple external canister filter. Simply put it on a shelf close to the aquarium, connect the intake and outtake tubes, and turn it on. It really could not be any easier. It is a nice choice because it does not take up any room inside of your fish tank.

The EHEIM Classic External Canister Filter is only a mechanical and biological filter, which is still pretty good for Flowerhorn tanks. That being said, it does not do any chemical filtering, which might be a problem.

However, this filter does come with EHEIM Mech and Substrat Pro filter media for highly effective mechanical and biological filtration. The silicon ring on the head of the filter makes it easy to open and close, easy to maintain, and it stops leaks from occurring too. This is a very simple yet effective canister filter to go with.


  • Easy to install and set up.
  • Great mechanical and biological filtration.
  • No leaks.
  • Easy to maintain.
  • Filter media is included.
  • Rated for up to 92 gallon tanks.
  • Great water flow.


  • A little noisy.
  • No chemical filtration.
  • No flow rate adjustment.

You can buy the EHEIM Canister Filter at Amazon here

3. Penn Plax Cascade Canister Aquarium Filter

This is another really simple yet effective filter to go with. It’s a canister filter, so it won’t take up any space at all inside of the aquarium, but you will need some extra shelf space on the side for it. This is quite the efficient little filter, as it is rated for aquariums up to 100 gallons in size and can easily proves 265 gallons of water per hour. This is more than powerful enough to deal with a medium size Flowerhorn tank.

The Penn Plax Cascade Canister Aquarium Filter is a 3 stage filter which engages in all 3 major types of filtration including mechanical, biological, and chemical filtration. It does quite a fantastic job at removing all kinds of impurities from the water. The Penn Plax Cascade Canister Aquarium Filter stands up all on its own, it has a really durable shell, and it actually looks pretty neat too.

The Penn Plax Cascade Canister Aquarium Filter comes with quick disconnect tubing for easy maintenance, plus the lid comes off easily too. However, once the lid is on, it won’t just come undone by itself. It has a great sealing mechanism for a leak free experience.

This particular filter does feature an adjustable flow rate, which is quite convenient because you can adjust it to fit your exact needs. The Penn Plax Cascade Canister Aquarium Filter is easy to set up, easy to use, and easy to maintain.


  • Very powerful filtration.
  • Comes with all 3 stages of filtration.
  • All filter media included.
  • Does not take up space within the tank.
  • Leak free seal.
  • Easy to maintain.
  • Adjustable flow rate.


  • Fairly loud.
  • Hoses are a little stiff.

You can buy the Penn Plax Cascade at Amazon here

4. SunSun-China Canister Filter

This is the final option on our list today, but certainly not the least in terms of value. The SunSun-China Canister Filter can be effectively used for aquariums up to 150 gallons in size and it can easily process up to 525 gallons of water per hour. This actually makes it one of the most powerful filters on our list today, allowing it to easily handle a medium size Flowerhorn tank.

What is really cool about the SunSun-China Canister Filter is that it comes with a UV sterilizer for controlling algae and for promoting the growth of beneficial bacteria. The SunSun-China Canister Filter engages in all 3 major types of filtration including mechanical, biological, and chemical filtration for clean and crystal clear water. It does in fact feature 4 media trays so you can customize what kind of media is inside of the SunSun-China Canister Filter.

The SunSun-China Canister Filter won’t take up any space inside of the tank, which is fairly convenient. Simply set the SunSun-China Canister Filter up, connect the hoses, turn it on, and you are good to go. Thanks to the easy off lid, maintenance is made easy, but when the lid is on, the awesome seal it has prevents leaks from happening without question.


  • 4 media trays.
  • 3 stage filtration.
  • Awesome 525 GPH flow rate.
  • For aquariums up to 150 gallons.
  • Easy off lid.
  • Easy setup and maintenance.
  • Does not take up space inside of the tank.
  • Features a UV sterilizer light.


  • Fairly noisy.
  • Shell is not all that durable.

You can buy the SunSun HW at Amazon here


As you can see, there are quite a few top contenders for the title of the best filter for Flowerhorns (the Fluval 406 is our top pick). We would definitely recommend taking a closer look at any of the above options as they all work really well. Remember folks, you need a really powerful filter for Flowerhorns, and the above models definitely come with lots of filtration power. We have also covered ideal food options for head growth on this article.