Fluval internal powerfilters have been the staple of the hobby for many many years. The latest generation of Fluval internal powerfilter is the U-Series - which benefits from all of the learnings of the its predecessors. With four models available, the Fluval U-Series is suitable for aquariums up to 200lts. The U-Series is installed within the aquarium using suckers to attach it to the back glass of the fishtank. 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. The clean water is then returned the aquarium, aerating it.

The Fluval U4 Internal Filter is brand new onto the market, replacing the Fluval 4 Plus internal power filter. Easy to use and quiet running, the Fluval U4 offers powerful and economical filtration. This filter is designed to be used both in aquariums and reptile tanks and for quick and easy maintenance.

The Fluval U4 is can be used in aquariums between 130 and 240 litres, with a flow rate of 1000 litres per hour. Maintenance is easy with top access. Other features include adjustable flow rate, a directional output nozzle and the filter comes complete with a foam filter.

To support your Fluval U4 internal power filter, we stock the full range of replacement filter medias within our filter media section. This includes replacement foam pads and polyester and carbon pads. We also stock replacement BioMax ceramic filter media that is designed for enhanced biological filtration.

Aquacadabra acts as credit broker/intermediary and not as a lender.

Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.