Fluval 406 Review: Should You Consider Buying It?

When it comes to choosing filtration systems that are versatile and easily applicable to larger tanks, canister filters are top on the list (or at least near the top).

As part of our efforts to identify the best filter units in the market, we discovered the Fluval product line.

If you desire an external canister filter that will simplify the filtration of your aquarium and make it as worry-free as possible, then you should consider investing in the Fluval 406 External Canister Filter.

The Fluval 406 is an upgrade of the Fluval 306 that promises to perform better and consume less power than its predecessor and previous generations. It has a filter capacity of 100 gallons and offers a multi-stage filtration which provides a deep clean for your large tank, ensuring the safety of your guppies.

This filter boosts of many unique design points that make it superior in performance and efficiency to other canister filters of similar size and shape. Given its high filter capacity, you get up to 35-50% more water and you don’t have to worry about cleaning and maintaining the unit all the time.

In terms of sustainability and reliability, this Fluval filter is second to none. Even in the most demanding situations, it will still impress.  

In the article, we are going to take a close look at the features of this product, as well as what to expect if you eventually decide to put out your money for it.

Fluval Canister Filter for Aquariums - 406 - 100 Gallon
  • Multi stage filtration for healthy fresh & saltwater aquariums
  • Suitable for aquariums up to 100 gallons. Flow Rate: 1450 LPH (383 US GPH)
  • Sound dampening impeller design for a quieter operation. The Fluval 406 Canister Filter has a unique square shaped canister design that holds 35 to 50 percent more water than round canister filters of similar size allowing better water flow through a complex cleansing path that maximizes contact with the filtration media
  • Equipped with a clog proof intake strainer and a dual layer foam screen. To prevent water from dripping onto the receptacle or plug,a “drip loop” should be arranged by the user in the cord connecting appliance to a receptacle
  • Built with a patented Aqua stop Valve, multiple filtration baskets, and rim connector assemblies; 3 year warranty.Media Capacity: 8.5 L


  • Highly versatile and flexible
  • Easy to clean and maintain
  • Quiet operation
  • High filtration efficiency
  • Easy hose disconnection
  • Advanced motor technology
  • Compact size and style


  • No spray bar
  • Impeller might be defective

Features and Benefits

Quiet Operation

Canister filters that produce a lot of noise are no joy to anyone, not even when they expel a lot of power. Such units can be extremely annoying if you had to stay in the same room where the aquarium is. Luckily, Fluval filters perform differently.

Although the Fluval 406 can support aquariums up to 100 gallons in size, it doesn’t produce much noise as one would expect. Just like its predecessors, it has quiet operation even though it comes with a bigger and more powerful motor.

The noiseless environment of the filter gives you the chance to place the aquarium somewhere in a room such as your living space, where everyone can notice and admire your little guppies.

The reduced noise level of the machine can be attributed to its sound dampening impeller design which makes it up to 15% quieter than its competitors, especially the hang-on-back options.

That said, you may notice a little noise when you first setup the unit, but these should be resolved after few days of use. And in case you come across any other problem within the first year of use, you have the product warranty to cover you.

High Capacity and Flow rate

As earlier indicated, this unit is meant for aquariums or fish tanks that have up to 100 gallons capacity. In other words, it’s the big boy of the Fluval bunch.

In addition, the machine has a flow rate of 383 gallons per hour, which is quite impressive. A hydraulic motor is also added to the filter to increase the rate of filtration, which in turn improves flow rate and lowers the maintenance of the filter.

This unit also boost of an efficient filtration system which consist of multiple removable baskets for holding the filter media responsible for mechanical, chemical and biological filtration.

What really makes this filter a beast is the fact that it directs the water flow through a path that ensures maximum contact with the filter media. This ensures nothing escapes the filter, thereby leading to an output that is cleaner and clearer water, much to the delight of your guppies.

Unfortunately, the Fluval 406 doesn’t come with a spray bar. So if you ever need to spread out the water flow in your tank to accommodate more fishes, you will have to purchase an addition spray bar.

Compact Design

When you tell someone about a large capacity canister filter, the usual expectation is a machine that is robust, loud and heavy. But this is not the case with the Fluval 406.

This filter comes with a square-shaped compact design that helps you save space despite the large capacity of the filter. Due to this design, the machine can hold up to 40% more volume of water than round filters that has the same size. This also allows you to pack more filter media into the filtration baskets.

The product dimension is 10 x 8 x 20 inches and it fits well into any aquarium cabinet.

The base material for the filter is made with high-quality plastic which makes the entire construction lightweight yet rigid enough to be hooked to an aquarium. The low weight of the unit also makes it portable.

Easy setup and low maintenance

Installing a canister filter can be a bit challenging especially if you are doing it for the first time. Luckily, this is not the case with this unit.

The process of setting up this filter is quite easy and doesn’t take much time. No need for a siphon – thanks to its instant prime feature.

Admitted, the instruction might not be straightforward but if you can follow the images you should be able to set it up in record time.

It will also interest you to know that cleaning and maintaining this filter is super easy, and that is because it features patented Aqua-stop valves and lift-lock clamps.

The Aqua-stop valves is useful for stopping water flow when cleaning the filter so as to prevent possible leaks. This way, you can do maintenance without really disconnecting the main supply pipe.

The Lift-lock clamps helps to ensure greater stability by locking the motor housing in place so that cleaning and maintenance will be much easier and simple. 


1. What’s the height of the fluval 406?

For the 406, the canister is about 20 inches tall

2. The Fluval 406 model has how many volts?

It’s a 120 volt model

3. Can the filter operate horizontally?

No, it can’t, it has to be placed vertically upright.

4. Does it come with a filter media?

Yes, it comes with a filter media

5. Whats the gph for the fluval 306 canister filter?

383 gallons per ho

The Bottom Line

If you have an aquarium that is anywhere between large to medium size, up to 100 gallons, then this filter will make a great customization option for your filtering media. The clean water it provides will give your guppies a boost of mood and you, a rest of mind. You will not be disappointed.

On the other hand, if you consider the power too much for your tank, then you might want to go for something smaller.

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.