Fluval 406 REVIEW – The most amazing canister filter you can buy

Fluval 406 review


Have you ever found it so difficult to clean your fish tank every week?

I have. Because I had a little shoal of Arowana in my tank and that was a quite sensitive type of fish, I had to change the regularly to keep them healthy and thriving well. The dirty living environment was a very suitable environment for harmful bacteria to develop and gain all the food of my fishes. Besides, changing the water often could also create more oxygen and maintain the ideal pH level for them.

However, if you are sharing the same situation with me, you must know that the task can get really exhausted, particularly when you have a large-sized tank. I used to feel so intolerable due to cleaning it each week. At weekends, sometimes, I only wanted to sleep all day, go out to have fun with my friends, or take care of my baby. Staying at home and rubbing the tank were not ideal things to do. Therefore, I tried to save my time and make my life more convenient by purchasing some types of filters. And after some products with horrible quality, I finally found Fluval 406.

It has been the most unique filter that I ever had a chance to use. Purchasing it was one of the best correct decisions in my entire life due to the conveniences it brought. Therefore, in this Fluval 406 REVIEW today, I would show you everything you need to know about it and how your life would change if you purchase this incredible machine.

 What is Fluval 406?

I don’t know if you have heard of it, but it is the best canister filter ever for your fish tank. It can help you clean it and create a great as well as uncontaminated environment for your beautiful fishes.

Fluval is also a product stream from Hagen, one of the most prestigious brands in the world that create products for pets. This filter it is an external one, which you need to put it outside your tank for filtration. I will show you information about it in detailed.

Technical information

  • Aquarium capacity: 24 – 40 US Gallons
  • Product dimensions: 4*3.5*8 inches
  • Product weight: 10 pounds
  • Media stages: 3 stages
  • Output: 155 US Gal
  • Wattages: 120V/60Hz : 7.5W & 230 – 240V/50Hz : 6W

What is included in the package?

  • Instruction manual
  • Foam pads
  • Ribbed hosing
  • Polishing pads
  • Intake and outflow
  • Activated carbon (70 grams)
  • BioMax (120 grams)
  • Rim connectors
  • AquaStop valve system
  • Intake strainer

What are the great features of Fluval 406?

  • Structure

The first thing I need to tell you is that this product is very rigid and well-built. Its is made of hard plastic, which has a fantastic benefit to water flow smoothly on the inside and protecting the components parts. If you ever drop or fall it accidentally, I’m sure everything will be safe.

It also has a lift lock clamp, which in my opinion, is the most creative idea ever. No matter what happens; the water will never be leaked out and spill on the floor. It feels so annoying when seeing your floor wet, doesn’t it? Before I bought this filter, I had experienced some others, and they all dropped water on my floor. And my kids slipped several times just because I did not clean that up in time. All because their locks were so unstable and certainly not clamps.

Therefore, when using this filter, you won’t have to worry too much or continuously keep an eye on it. Just leave it there and let it do the job.

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  • Setup

Although the pictures of the product look relatively complicated, the installation process is quite straightforward and convenient. Nevertheless, if you already have some prior knowledge or experiences on canister filter before, you will probably meet fewer difficulties.

Those were my feelings at the first time seeing and touching the product. So with starters, about how you can make it work properly, I will show you in the next parts of this Fluval 406 REVIEW. In this section, I just want to tell you that it is not difficult to make it work. Just follow my instructions, and you can do it.


  • Circulation

Just like other filters, this Fluval 406 has a water flow in, and a water flows out. The water that needs cleansing will flow into the inlet, go through filtering layers, and be bumped out back to your fish tank through the outlet. That is how the water will circulate.

What I am really surprised at the flow is the high propulsive force of the outlet, which is unyielding. It is an enhanced feature, and I think it is very smart. Because this is an external filter and your fish tank cannot be placed on the ground, you will find it quite hard to find out where the filter should be put other than on the floor, right next to the tank. And as a consequence, your filter will have a lower height than your tank. So if the outlet does not have a dominant force, the water cannot come out easily and quickly. According to my observation, this product is one of the few filters that can do it. You won’t have to care about insufficient oxygen, or the tank might get dirty anymore after having it.

Moreover, its AquaStop valve is a unique feature as well. You can use it to adjust the force and flow rate. Engaging, disengaging, or setting the level between those modes depends on you and your type of fish. For me, I always choose the middle level, which is not too low but not too intense. Arowana is quite sensitive, so I’m afraid that too much strength can suck up all of the useful seaweed for my fishes and create an inappropriate environment for them. Besides, their colors look incredibly beautiful and sparkling in an average water flow rate. You can enjoy looking at them while the filter is running.

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  • Noise

I have to mention this because the previous filtering machines that I used created terrible noise. My second one, sometimes, even startled my dog when he was sleeping and made my baby cry because she thought it was some ghost. She just hated the noise.

But this product runs very smoothly and quietly. There has been no noise coming out since I bought it. My dog could be sound asleep, and my baby could play in the living room without being under any fear. And I believe this feature is another improvement of Hagen. In a research conducted by the company about the satisfaction of the customers with this new canister filter, the noise level has been estimated to work quieter from 7 to more than 15 percent. And that is just great. No one wants to have that sound in the house every day.

However, if you find any abnormal noise at the back of the product while it is running, it must have some defaults. Check it and take the filter to its Service Center as soon as possible.

  • Filtration

Of all the features, this is the one that you need to pay the closest attention to. Without it, a filter will be useless. And the system of filtration of Fluval 406 is just the most modern one in the market.

When opening it, you will see two parts. The one on your left is a thick sponge, which plays the role of the initial cleansing layer for fresh water. All of the dirt and dregs will be wiped off after the water goes through it. Then, the water will flow through three layers placed on your right, which is designed in the shape of small baskets. You will find no difficulties in lifting them up, and they include the mechanical, biological, and chemical filters.

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And I wrote that this product was the best in the market because I had never seen such a detailed and creative design like this in any other products. Mechanical layers at the bottom will filter the solid when the water flows through, such as fish stools, mud, uneaten food, and dust. This phase is just a rough filtering process and makes no effect on the chemistry in the water. It plays a major role in support the subsequent layers to do their responsibilities.

Biological filtration is the second phase. It only eliminates the harmful bacteria and other inappropriate agents in the water. Bacteria depend on the small amount of food and oxygen of water to reproduce and develop. In this process, it will prevent separate those for a short period until all the bacteria are all destroyed. And then, it gives the oxygen and food back to your fish. If you have a tank, this product would be a perfect fit.

And the last process is chemical media. Via the second layer, the water is now immaculate and fresh. So this filter serves only two purposes of removing dissolved and unwanted tiny agents from the water and creating an ideal environment for your fish. There are two types of chemical filtration, which are activated carbon and exchanging ion resins. This product uses the first way, and in my opinion, it is very flexible and efficient. Eliminating harmful factors, such as chlorine, carbohydrates, antibiotics, or any unnecessary medications, is what it does best. I believe your fishes will thrive well and healthy when they have this outstanding filter.

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How to use it?

And as I promised in some previous parts, I will show you how this product works in my Fluval 406 REVIEW today. These are some steps that you would want to follow.

Step 1: Open the box of the filter that you have just purchased, and you will see all of the components I showed you in the very first parts. Take them out and peel off their packages.

Step 2: Now you have the parts ready. It’s time for installing. You will see two parts on the left and right just like I told you. Get them out to check their quality. And the particulates that are used for filtering will lie in nylon bags. You need to rip them off and put the particulates in their correct layers.

Step 3: After the beads have been laid in the layers, shut the boot of the filter and use the clamps to lock it. Remember to do this carefully to prevent the water from spilling out of the bin.

Step 4: Install the hose inlet and outlet to the small spaces right on the top of the filter.

Step 5: Put the filter next to your fish tank and install one head of one hose into the inlet and the other to the water. Repeat the action with the second hose.

Step 6: Hit the power button and let the machine do its job.

It’s not so complicated, isn’t it? You will be able to discover more clearly when watching this video:

Are there any notifications?

Similar to other product, this filter will not keep its original quality after some time of using if you don’t take care of it. The layers will definitely work at the maximum level so you should replace them after 5 or 6 months, which are the standard periods for them to get dirty. And when you lift the layers up for replacing, remember to clean the inside surface of the bin as well. Your filter will work smoothly and efficiently even after a long time.

Besides, when you first purchased it, the initial thing you need to do is to test it. If there is any problem with the system or the filter makes noises while running, take it to the Service Center immediately for fixation. Otherwise, it will be broken, and you will lose a ton of money.


I believe with the features I mentioned above; you will find a significant number of pros of this product. First, it is a fantastic machine to create an ideal environment for your fishes. With the design of the layers, the water can always keep its pH rate and purity, which are the most appropriate living conditions for the fishes. You will never have to worry about your fish dying without discovering the reason why. You can have faith that no bacteria or harmful chemicals can hurt your fishes after you purchase this cleansing machine.

Moreover, it works very quickly. Although the processes I gave you were quite long to explain, they take only about two minutes to implement in real life. I had chances to use various filters before buying this product, but it was still the very first one that worked in such a short time like that. The water always seemed to look fresher, and my fishes swam faster as well as ate more after I ran the machine for about a minute. If you are keeping a shoal of Arowana like me, you will immediately see the difference.

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Besides, the product is incredibly easy to clean. Because the cover is made of hard plastic, you will not meet any difficulties in wiping off all of the dust and filthy dregs in it. A wet cloth will be sufficient. Otherwise, just unleash the internal components and put the bin under the faucet. The dirt will come out in no time.

And as I showed you, it is very comfortable to set the product up. Despite a little confusion in the first place, I still managed to run it after only 3 minutes. If you follow my directions in a precise way, the time can even be shorter. Just try it, and you will see it.

Next, the product is really lightweight. Although Fluval 406 is a large-sized filter of all the goods that Hagen has, it still weights only 10 pounds. Therefore, you can bring it anywhere you want with no obstacles. Besides, if you have a little kid, you also won’t have to worry too much about his or her safety. Your child may bring down the bin and bear it heavily upon him while playing. But the product can never put him in a dangerous situation with only 10 pounds. So you can just focus on making your dinner, and I’m sure your kid will be okay.

Finally, what I like most about this product is that it is convenient. With 4 inches in length, 3.5 inches in width, and 8 inches in height, I can put it anywhere after I have done using. In the garage, the small attic, or even under the kitchen table are all appropriate. Feel free to lay it down or straight because its internal components will not be affected at all. It’s astonishing, isn’t it?


I don’t have anything to complain about my filter. I have been using it for over a year and still completely satisfied. Nevertheless, when I introduced it to some of my friends, they had some problems. Most of them were about the noise after they use it for a while. So I suggested them change the particulates inside because there might chances that they were contaminated after a long time using. And I was right. That was the most common the users meet with this product. Therefore, whatever you do, change the components regularly to maintain the product and have the best quality.

How can you buy it?

It’s very easy. You don’t even have to go to any Hagen store to purchase the product. Just stay at home, open your laptop, get access to Amazon.com, find the name of the filter, and click “OK.” A list of products will appear right in front of you. Click the one that has the exact name, Fluval 406, and choose Buy Now. It will be delivered to you within 12 to 24 hours. You can pay your money for the delivering guy or pay it online through your Visa, Paypal, or Master Card if you have one. And you should have one. It makes all of the transactions more comfortable and convenient.

Why should you buy it?

With all the features and advantages I mentioned, I believe you have enough reasons to purchase it. For me, it’s the life of the fishes that I really care about. Besides playing with my kids, watching my Arowana swim with bright colors and taking care of them is everything making me fully relaxed. What could be better than coming home after a stressful working day and enjoy your hobby?

Besides, you won’t need to spend so much time on cleaning your fish tank anymore. Before having this product, it often took me 30 minutes to one hour to clean the whole tank inside and outside. It was really exhausting sometimes because working in the office and take care of my baby could take all of the time of a day. I believe you are having at least one of those issues. This product would make everything ultimately easier and more convenient. All you need to do is to bring it from the garage to where the fish tank is and hit the start button. Your life will be a lot more comfortable if you purchase this filter Fluval 406 now.


Have you been enjoying my Fluval 406 REVIEW today?

I hope you have. And I also hope that you would have the wisest decision to take care of your fishes after reading it.

So if you like this article, please share it on your social network or with your family and friends. I believe these feelings and experiences are worth sharing, especially, when your friends love their fishes just like you and me. Furthermore, if you have any questions or comments, it would be my pleasure to receive and reply. Please leave it down below.

To sum up, thank you for reading my article, and I’m looking forward to seeing you in my subsequent ones. Goodbye.



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