Filtration is essential in any aquarium, no matter the size or water type, so finding the right filter is an important step in setting up your tank. Water is drawn through the filter's canister, within which are filter foam for biological media and carbon and polyester pads for mechanical and chemical filtration.

Replacements with Manufacturer Authorization: Replacements, whether parts or goods, can only be offered when authorized by the manufacturer. The filter provides the option of setting the flow output in 3 different positions, a key benchmark in underwater filtration. 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.

The U-Series is installed within the aquarium using suckers to attach it to the back glass of the fishtank. The whole filter hinges forward for complete removal from the aquarium, leaving the fixing bracket in situ.

This information allows consistent decisions to be provided, ensuring all applicants are treated fairly.However, if you do have more available space, such as a cupboard underneath your tank, it is worth exploring the option of using an external water filter, as this will free up more space for your fish. You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. Use the U1 as a primary filter in smaller aquariums or as a supplementary filter for larger aquariums. The solution is two sponges, so that they can be cleaned alternately, or even replaced alternately, and the bacteria remains intact. The complete line, consisting of Fluval U1, U2, U3 and U4 Underwater Filters, includes many practical and versatile features that make them ideal for application in freshwater and marine environments.