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They will also work well as a powerhead for water circulation, with the added bonus of the extra filtration.The adjustable 3-way flow control feature lets you position the water flow output to meet your specific needs. So that I could compare models like for like I requested their choice of model for an aquarium 60cm/24” long with standard dimensions and a volume of between 50-70 l/11-15 gal.

The 'rate of interest' is the cost you will pay each year to borrow the money, expressed as a percentage rate.

The Adjustable 3-Way Flow Control feature (U2, U3 and U4 models) lets you position the water flow output to meet your specific needs.

Depending on the type of fish that you keep, you are either going to want slow or fast flow and a flow control that is simple but effective.

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.

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. In our collection you will find Fluval U2, U3 and Fluval U4 internal filter models, along with Fluval U Mini and Fluval U1 models, which are ideal choices for smaller tanks. Prior to purchasing the Fluval U2, the recommended filter for my 65l aquarium was woefully inadequate.

Other features include adjustable flow rate, a directional output nozzle and the filter comes complete with a foam filter. VAT stands for value-added tax, which is charged on most goods and services within the European Union.