U3 Underwater Filter, up to 150 L (40 US Gal)

Offering outstanding 3-stage filtration, increased water movement and vital aeration, Fluval U-Series internal filters are the perfect solution where external filtration is not possible.

Designed for aquarium up to 40 gallons
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
Adjustable 3-way flow control – Top Output for circulation and oxygenation, Integrated Spray Bar for a gentle even flow, and Bottom Output for deepwater agitation
BioMax biological media included
Made in Italy
Ideal for freshwater, saltwater and reptile environments