Fluval U4 Underwater Filter (Up to 240L)

6 (Reviews)

Fluval U4 Underwater Filter (Up to 240L)

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    Fluval U4 Underwater Filter (Up to 240L)

    Setting up a new tank in your home? Get the Hagen Fluval U4 Underwater Filter and create a beautiful waterfall feature in your aquarium for an appealing look. Designed with an innovative 3-way filtration system, the Fluval underwater filter is an ideal pick for all types of aquariums. If you own a larger tank, use it as a supplementary filter. However, it can work equally well as a primary filter. The Fluval U4 filter is designed for aquariums up to 240L or 65 gal capacity.

    For shallow tanks, lay it vertically to create a decorative waterfall feature. The long and slim structure of this water filter allows it to be placed horizontally. Using a three-level system with three varied types of filtration pads, this aquarium water filter ensures improved water quality and a healthy environment for fish. From saltwater to freshwater, the Fluval water filter is suitable for all kinds of setups with or without reptiles and plants.

    It comes with a convenient flip-top lid for easy access to change or maintain the filter cartridge. Highly effective and newly redesigned media and BioMax cartridges are included in the pack to improve water quality and give out clear and clean water. Not just for an appealing look, but the water filter also ensures healthy water that is essential for fish to swim happily and actively. From creating customised flow patterns to waterfall decoration, this water filter is all setto be a worthy investment for fish lovers!

    35.6(D) x 13.4(W) x 11.7(H)
    Product Benefits
    • Suitable for aquarium up to 240L or 65 gal capacity
    • Effective 3-way filtration system to keep the water healthy and clean for fish
    • Offers quiet operation for maximum convenience

    Jollyes Delivery Options

    We want to make sure that your parcel gets to you and your pet as quickly as possible.

    Typically orders are taking between 1-3 working days to be dispatched. There may be occasions such as a stock availability issue or high orders volumes where your delivery may not arrive within 5 working days. Currently, due to a high volume of orders in the carrier networks there may be a delay in your order arriving.

    You must order before 12pm for our 1-2 business day(s) express and 2-3 business days standard shipping.1-2 business day(s) express and 2-3 business days standard delivery is from dispatch from our warehouse. Most orders placed before 12pm will be dispatched the same day.

    DELIVERY TO REPUBLIC OF IRELAND CURRENTLY SUSPENDED: Due to the current situation, our carriers are not making deliveries to the Republic of Ireland. Because of this, we are unable to offer delivery for the time being. We will update the site when this changes.

    UK mainland delivery charges

    Option Price
    UK Standard 2-3 business days Delivery (order before 12pm) for orders over £40 Free
    UK Standard 2-3 business days Delivery (order before 12pm) for orders between £10 and £39.99 £2.99
    UK Standard 2-3 business days Delivery (order before 12pm) for orders below £10 £4.99
    UK Express 1-2 business days Delivery (order before 12pm) £5.99

    Non UK mainland delivery

    Option Price
    Northern Ireland Standard Delivery  £7.99
    Republic of Ireland Standard Delivery - CURRENTLY UNAVAILABLE  CURRENTLY UNAVAILABLE
    Isle of Wight Standard Delivery £13.99
    Scottish Highlands Standard Delivery £13.99
    Isle of Man Standard Delivery £16.99
    Channel Islands Standard Delivery £16.99

    Free UK delivery is only applicable for mainland UK addresses, delivery charges will still apply for Northern Ireland, Republic of Ireland, Isle of Wight, Scottish Highlands, Isle of Man and the Channel Islands.


    1 hour Click & Collect is now available.

    We are pleased to announce that Click & Collect is now available across all our stores.

    Product Reviews

    Fluval U4 Underwater Filter (Up to 240L)

    4.7 out of 5

    6 Reviews
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    Good price

    Good quality item

    By Chris on May 6, 2024



    By Stev on October 19, 2023



    By Stev on October 19, 2023

    5 Stars

    5 Stars

    By Anna on March 5, 2021

    best filter

    I would strongly recommend this filter it works a lot better than the old fluvel filter my tank is looking great nice and clear

    By jackie on August 25, 2016

    top notch

    great value for money,the best filter I have bought and I have had a few !highly recommend people buy this as you wont be disappointed and it saves a load of time with cleaning the tank.

    By leggy on August 20, 2016