Fluval U Series Internal Filter

From £25.99

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Fluval U Series Internal Filter
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Fluval U Series Internal Filter

Fluval U Series Internal Filter

Internal Filters are an excellent option for small to medium sized aquaria. They are simple and easy to set up, they sit just inside the aquarium itself meaning they can be easily installed into any fish tank, with no troublesome pipes and hoses. They will also work well as a powerhead for water circulation, with the added bonus of the extra filtration. It is worth noting that you should clean your filters impellor every couple of weeks to ensure it is functioning normally and keeping the water moving around the tank. U series underwater filters offer superior water purification, movement and aeration capabilities and have been designed for use in both fresh and saltwater applications. 

Key Features:

3 Stage Filtration
Fluval U Underwater Filter provides complete and efficient 3-stage filtration to create superior aquarium water quality. All models come with a Bio-Foam filter pad to remove large particles. The larger 2 sizes also include a Poly-Carb pad to assist with removal of fine particles, chemicals and odours. They also have the addition of Biomax filter nodes to assist with biological filtration. 

Adjustable 3-Way Flow
The adjustable 3-way flow control feature lets you position the water flow output to meet your specific needs. The Top Output setting provides maximum circulation and oxygenation, the Integrated Spray Bar setting provides a gentle, even flow for planted aquariums, and the Bottom Output setting is for deepwater agitation.

Quick Flip Top Maintenance
The filter also has a convenient flip-top lid that allows quick and easy access to the filter cartridge for maintenance or replacement. This enables easy removal of the filter media for maintenance without having to remove the whole unit from the tank. 

Find Spare Parts and Filter Media For This Item

Technical Specifications:

U1 U2 U3 U4
Aquarium Volume 55 L 45 to 110 L 90 to 150 L 130 to 240 L
Flow Rate 250 L/H 400 L/H 600 L/H 1000 L/H
Power 5 W 5 W 6 W 12 W
Product Dimensions 10 x 8 x 15 cm 20 x 9 x 10 cm 26.7 x 8.3 x 10 cm 33 x 10 x 11 cm
Product Highlights
  • Fluval U1 Filter, for aquariums up 55 L
  • Fluval U2 Filter, for aquariums from 45 to 110 L 
  • Fluval U3 Filter, for aquariums from 90 to 150 L 
  • Fluval U4 Filter, for aquariums from 130 to 240 L
  • For fresh and saltwater aquariums
  • Adjustable 3 way flow
  • Quick flip top maintenance
  • Unique 3-stage filtration
  • This product comes with a 3-year warranty.

Product Manual For This Item


Delivery costs for your order will be calculated during the checkout process using your designated delivery address and chosen delivery method. You will only pay one delivery charge for your order and this will be calculated on your entire basket after you have entered your delivery address. If for any reason your products are not deliverable to your chosen delivery address, the checkout will inform you of this before your order is submitted.

Our chosen couriers are DPD and Royal Mail. If an order is dispatched directly from a manufacturer then you may have a different courier delivering your order. Full tracking details for all orders sent by DPD will be provided when your order is shipped. You can choose ‘Express Courier’ to receive this service on any standard order. Any order sent from our suppliers, or with DPD will only be delivered Monday - Friday.

All stated delivery times begin from the moment your order is accepted which is when your order is shipped from our warehouse our suppliers. An order confirmation email is not the acceptance of an order by us.

A signature is required for all orders sent via DPD, at which point the responsibility for all consignments passes to you. If you have specified another recipient (who is not you) for delivery purposes, then you accept that evidence of a signature by the said recipient (or another appointed person) at your delivery address is evidence of delivery and fulfilment by DPD and this accepts the transfer of responsibility to yourself.  

We do not ship orders internationally.

To see a full list of our delivery charges and to read our terms and conditions, click here.

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