Offering outstanding 3-stage filtration, with increased water movement and vital aeration, Fluval U-Series internal filters are the perfect solution where external filtration is not possible.
Now with new and improved design features; new sleek design, new easy grip water control paddle and a new redesigned media cartridge that traps more debris.
Designed for aquariums up to 55 L (15 US Gal).
Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums.

Position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature.
Position vertically against aquarium wall to create currents or customized flow patterns.
Convenient flip-top lid allows for quick and easy access to filter cartridge for maintenance or replacement, BioMax biological media included.
Ideal for freshwater, saltwater and reptile environments.

Use the following guide to select the filter suitable for your tank:
Suitable for the following aquarium sizes:
U1 - Up to 55 litres,
U2 - 45-110 litres,
U3 and U4 - 90-150 litres.