Fluval FX6 Canister Review: Is It Really Worth It?

Searching for an aquarium filter that would end your stress and struggles? If so, then the Fluval fx6 canister filter is your brand. This unit is specifically designed to afford you a clean and clear tank, much to the delight of your guppies.

In this article, we are going to review the machine by going through its features and benefits, as well as its downsides.

But before we get started, let’s see how the FX6 and its 10 predecessor compares.

Differences Between Fluval Fx6 And The Fluval Fx5 

The fluval fx6 canister filter is much more powerful compared to its predecessor. It comes with a biomass filter available in the set, which is a significant improvement compared to the fx5.

The fluval fx6 upper lids are redesigned to give you a strong fitting against the pressure on the filter body making it more convenient. The lid has 2 spinning blocks with 12 parts on a much higher scale, they are made for making marks and reminders on the tank and also carry out maintenance.

Now you can have a record on the filter to notify when you renewed your tank water or maintained your fx6 filter last. Heat generated by any equipment is generally due to the amount of energy consumed. This therefore means that during summer when temperature is high, fluval fx6 users will supply more 20W more heat.

Fluval Canister Filter, FX6 Filter (400 Gal)
  • Multi-Stage Filter that produces healthy aquarium water, freshwater or marine aquariums
  • Features Smart Pump Technology for optimal filter performance, efficiency and management
  • Self-starting filter-just add water and plug in. Head height (maximum): 3.3 m (10.8 feet)
  • For aquariums up to 400 gallons


  • Efficient water filtration
  • Sturdy construction
  • Low maintenance requirement
  • Comes with bio-filter
  • Affordable price


  • A bit noisy at the onset

Features And Benefits 

Easy Starting

Starting the fluval fx6 canister filter isn’t a problem when one follows instructions. Once you have read it, everything becomes very obvious.

If you already have filter experience, then the main thing about this filter is to remember that it is very important to pour about 8 – 10 litres of water into it before starting, otherwise it won’t start and the pump may be damaged.

It is easier and more convenient to pour water when its open at the stage of instillation of containers with fillers. Now this is what’s special.

The filter hose is a very thick one, which explains why its necessary to allow some airspace between the wall and the tank to avoid a situation where the hose can’t be brought between the tank glass and the wall.

Durable Construction

The build quality of the fluval fx6 canister filter makes it highly durable. Although it lacks foam plastic in it, the filter body is made in such a way that it won’t do any harm to the box no matter how the filter is handled.

The plastic used for the filter body is quite soft but that does not denote fragility, which is very good. The packaging has simple and understandable marking on it, which gives the buyers enough clue about the parameters of the filter.

Easy To Use And Maintain

One of the features that makes the fluval fx6 stand out amongst other filters is the location of its pump beneath and from outside the filter body. This makes maintenance very easy.

Another distinguishing feature is the fastening system of the upper lid. There are six clips that closely press the lid to the filter body and they are very easy to use.

It may also interest you to know that the pump of the machine is always filled with water to avoid it from running idle. This ensures that water bubbles in the filter won’t lead to increased noise or filter breakage in cases where the air content is large.

With fluval, water changing is quite alleviating, no need to lift heavy buckets. Simply affix hosing to output and leave the rest for smart pump.

The noise level of the filter is really nothing to worry about. This doesn’t mean to say that the machine doesn’t produce any noise, instead it implies that the noise is quite minimal.

So for people who can’t deal with the little noise, we strongly advice against having it in the bedroom. With continous use, the machine will eventually become quiet.

Improved Smart Pump Technology

This unit comes with an improved smart pump technology, which provides exceptional and outstanding filter performance. It possesses an electronic circuit board which controls the pump continuously. It also controls the self-starting filter feature, removes air that may enter or store up inside the filter system.

Within a twelve-hour cycle, the pumping stops to allow trapped air exit. Ensuring the best filtration efficiency at all times.

Efficient Water Filtration

As for the quality of water filtration the fluval fx6 canister filter stops at nothing but providing clean and crystal clear water upon continuous usage. It also has the capability of absorbing liquified impurities and dyes.

It has a removable and stackable media basket which eliminates water bypass and can hold a total of 1US gal (3.9l) of media.

The unit should be able to fit under most aquarium with an exceptional and outstanding height of just 21 inches.

Frequently Asked Questions

1. What is the capacity of the fx6?

The fluval fx6 canister filter can handle a 220-gallon fish tank. With proper maintenance, the filter should last you a long time.

2. What kind of voltage is suitable for it?

The fluval fx6 canister filter uses 120 volt. To use on a higher voltage, a converter will be needed.

3. How does water go through?

It pulls water from the top of the tank to the bottom of the canister. Then it filters through the media to the top of the canister back into the tank.

4. Will it fit plumbing done for fx5?

Yes, Totally! The fluval fx6 hose size matches the same as the fx5. So there’s no cause of alarming.

5. Does it come with filter media? 

Definitely! The fx6 canister filter comes with a filter media. But it is also possible to use any media of your choice.


Hopefully, we have answered your questions on whether fluval fx6 is a reliable aquarium filter or just a simple hype.

Be rest assured the fluval fx6 is one of the most efficient filters one could get, with its high rating across the internet as well. This aquarium filter will give you superb and enjoyable aquarium services.

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