Fluval Flex 15 Gallon Review 2020

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The current aquarium market is filled with fish tanks which may function differently but evidently look more or less the same.

The same bland, box-like hefty design is tried and tested, and it is something that most manufacturers tend to incline towards, leaving all creativity behind.

However, Fluval Flex is one of the very few manufacturers who like to think out of the box. Their latest line of aquariums come with one of the most attractive designs the market has to offer.

They are built to be the perfect accessory to any modern living space and is an ideal choice for those who have been keeping fish for years now and want something different from a traditional tank.

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Fluval Flex 15 Review 2020: Why should you go for it?

fluval flex reviewThis aquarium set from Fluval is just incredible when it comes to catering to all the fish petting needs for beginners and adept rearers alike.

The Hagen HG Flex incorporates some brilliant illumination features with a multistage filtration system, all housed in an amazingly attractive and contemporary design.

What makes the filtration system so much more superior to the tanks of the other brands is the 3-stage process, which helps to achieve much superior water quality. The filtration comes with an oversized mechanical (foam), chemical (carbon) and biological (BioMax) media, which keep the water clean from all forms of pollutants.

The 48 white and 6 RGB fully adjustable 2450 lux LED will allow you to have a spectacular view of the aquatic life, while the 7500 K LED will help promote the growth of plant life in the tank.

What could have been better?

There is not much that we can criticize about this tank, apart from the fact that the display area of the tank, which though states that it’s 15 gallons, is actually 10 and can limit the view of the aquatic life from certain angles.

The water pump volumes are not adjustable as well, which can be rather inconvenient to some.



  • Very attractive design; a must-have for any living space
  • Comes with a 3-step and a thorough filtration process
  • The convenient LED setting promotes plant growth


  • Water pump volumes are not adjustable


If you have been keeping fish for some time but have gotten tired of the age-old, box-like design of the tank, then the Fluval Flex might just be your pick for the day. With one of the best designs and filtration systems in the market, it can be a lot more than just a tabletop accessory for your home.

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Can’t make up your mind yet? Read our buying guide for fish tanks before you proceed with your purchase.

You should also check out our reviews of other models: