They will also work well as a powerhead for water circulation, with the added bonus of the extra filtration.

This is how this water filter for fish aquarium provides maximum circulation of water and oxygenation for the lovely marine and reptile creatures.

The various practical features of this aquarium filter include the output of the water flow in three different positions, an allowance to set the water flow output manually, and a gentle and even flow throughout the aquarium. This put me in the convenient position of having nine 24” tanks available in which to test filters, with seven containing no fish — so I would do two batches of tests, seven at a time.

Aquatics Ltd, trading as Aqucadabra, is an Introducer Appointed Representative of Pay4Later Limited, trading as Deko, which is authorised and regulated by the Financial Conduct Authority (FRN 728646). We specialise in Rare and unusual species of Tropical fish from all around the globe we have contacts in all the major fish houses of the world. Fluval U2 Underwater Filter provides complete and efficient 3-stage filtration, including Biomax biological filtering, to create superior aquarium water quality.You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. 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.