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Fluval U4 Underwater Internal Filter


Price: £40.00
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Fluval U4 Underwater Internal Filter

  • Top Access - for easy maintenance
  • Adjustable flow control
  • Quiet Running
  • For Aquariums 130 - 240 litres
  • 3 Stage 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 polycarbon cartridge traps fine debris improves water clarity and removes impurities. Stage 3 BIOMAX provides optimal biological filtration efficiency.

Features

For aquariums terrariums and turtle tanks Ideal supplemental or standalone filter or for installations where external filtration is not possible Filters debris and provides optimal biological filtration Silent and efficient Simple to install and maintain Engineered and manufactured in Italy

List Price: £40.00 Price: £40.00

What customers say about Fluval U4 Underwater Internal Filter?

  1. 23 of 24 people found the following review helpful
    5.0 out of 5 stars
    Superior to Other Comparable Filters, 9 Jan 2011
    By 
    E. Haynes (United Kingdom) –
    (REAL NAME)
      

    This review is from: Fluval U4 Underwater Internal Filter (Misc.)
    This filter has several design strengths:

    - Very quiet in operation (once all air has been expelled from the system).

    - Well designed filter media configuration (there are two coarse filter sponges, and two carbon / poly pad filters, resulting in reduced loss of bacteria if these are replaced one at a time).

    - Holds a relatively large amount of biological media compared to other products with the same flow rate.

    - Convenient to maintain (the pump is below the filter media chamber).

    Far superior to the Interpet PF4.

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  2. 16 of 17 people found the following review helpful
    4.0 out of 5 stars
    A good, steady filtration system, 3 Dec 2012
    By 

    Verified Purchase(What is this?)
    This review is from: Fluval U4 Underwater Internal Filter (Misc.)
    As someone who has owned fishtanks (tropical and marine) for most of their adult life, I have tried and tested many types of filters, from the old “undergravel” pump powered systems to the more common external filters. This purchase was to replace an external filter in my 180l tropical setup. I have finally given up on external filters. For their supposed benefits (less clutter in the tank, easier access for servicing etc) I have personally found them unreliable and when they go wrong they really do go wrong (airlock problems and pipe issues)

    I chose this item due to it being relatively compact, being a brand in the fish world, and its additional water circulation features. The beauty of an internal filter is in the setup – 10 minutes from reading the instructions through to it being operational and with minimal disruption to the fish. The unit looks okay – it is not too intrusive, but it is the water/air circulation which sets it apart from cheaper alternatives. The filter compartments are easy to access for cleaning. It is also very quiet running. Even after a few weeks of it being operational the water flow through the unit is still strong. Overall it is a good unit.

    The negatives. The actual filter media is very bespoke to the Unit. Personally I have always preferred being able to substitute manufacturers expensive filter media with cheaper options, the compact nature of this unit makes that difficult – so that is of course an additional expense in running this filter.

    But for a beginner, or indeed someone like me who has had enough of external filters leaking or not operating correctly, this provides a simple alternative at a decent price.

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  3. 5 of 5 people found the following review helpful
    5.0 out of 5 stars
    quality product, 23 May 2013
    By 
    philip

    Verified Purchase(What is this?)
    This review is from: Fluval U4 Underwater Internal Filter (Misc.)
    Received this item last week. Installed it immediately and within two days the water was crystal clear. A good experience from a quality product.

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