Fluval U1 Underwater Filter is ideal for use in all aquarium or reptile environments. Use the underwater filter as a primary filter in smaller aquariums or as a supplementary filter for larger aquariums. Fluval underwater filters with three-stage filtration are ideal for use in fresh, marine or reptile environments, and are also great for tanks with low water levels. Three-stage filtration with BioMax for superior aquarium water quality, flip-top access for quick and easy cartridge replacement, and three-way flow control make the new Fluval U Series the benchmark in underwater filtration.

• Filters debris and provides optimal biological filtration
• Simple to install and maintain
• Silent and efficient
• Ideal supplemental or stand-alone filter, or for installations where external filtration is not possible
• Comes complete with adjustable flow rate, 1 foam pad and output diverter; For use in environments up to 15 gallons