Fluval U4 Internal Filter

FLUVAL U SERIES UNDERWATER FILTERS. 3 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 internal filtration.
Fluval underwater filters with three stage filtration are ideal for use in fresh, marine or reptile environments. Stage 1 foam removes large particles. Stage 2 poly/carbon cartridge traps fine debris, improves water clarity and removes impurities. Stage 3 BIOMAX provides optimal biological filtration efficiency.
3 way filtration and 3 way flow control, not available on U Mini or U1.
All filters are supplied with filtration media, suction cups, etc.

U4
Maximum output 1000 litres per hour.
Wattage 7.5w.
Maximum aquarium size 240 litres.

We aim to dispatch all orders the same working day provided it is received before 4pm and payment confirmed, subject to stock availability. Orders received after this time may not be dispatched until the next working day. In the unlikely event of an item being out of stock, we will contact you via email to advise you of an estimated delivery date, to give you the option of cancelling or waiting.

Small and lightweight items (below 2kg) will normally be sent via Royal Mail 1st class, and will be delivered within 5 days, usually next day.
Larger orders with a total weight over 2kg will normally be sent via parcel carrier for delivery within 2 working days.
Any orders placed after 11am on Saturday will be dispatched on Monday. If the order is placed over a bank holiday it cannot be dispatched until the first working day.
We reserve the right to use the most cost effective service to get your order to you as quickly as possible.

For more details, see delivery and returns in the side menu.