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Fluval

Fluval FX4 External Filter (upto 1000L)

Fluval FX4 External Filter (upto 1000L)

SKU:A214

Regular price £247.99 GBP
Regular price Sale price £247.99 GBP
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Fluval FX4 External Filter (upto 1000L)

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Fluval FX4

The Fluval FX4 is based on the high performance FX6 canister filter with the same outstanding features designed to make aquarium fishkeeping easier and more convenient!

  • Multi-stage filter pumps out 700 gallons (2650 L) of water per hour
  • Smart Pump™ – advanced microchip technology continuously monitors and optimizes pump performance
  • Self-starting – just add water, plug in and Smart Pump™ will take over. Trapped air auto-evacuated every 12 hours to ensure maximum efficiency
  • Easy water changes eliminate need to lift heavy buckets. Simply attach hosing to output (Kit sold separately) and Smart Pump™ does the rest
  • Removable, stackable media baskets eliminate water bypass and hold a total of 1 gallon (3.9 L) of media
  • All filter media included – mechanical, chemical and biological
  • Aqua-Stop valves with leak-proof Click-Fit attachment system
  • Valves positioned at convenient 45-degree angle for easy installation and rotation
  • Anti-clog, telescopic strainer ensures continuous water flow
  • Multi-Directional Output nozzles can be fully adjusted to create customized water flows
  • Utility Valve with drain hose for easy maintenance and flushing of canister
  • Rubberized feet help ensure quiet operation
  • Compact 16.5″ tall design – easily fits under most aquariums
  • Made in Italy
  • For use in freshwater and saltwater aquariums

This super capacity yet compact canister filter processes and circulates 1700 litres (450 US gallons) of water every hour and has an astounding media capacity that produces cleaner and healthier results. The Fx4 bridges the gap between Fluval's famous 406 and FX6 external filters as the FX4 is suitable for aquarium's up to 1000L.


Filtering material can easily be placed in a removable stack of media baskets which is at the heart of Fluval's multistage filtration. The baskets are precision-engineered to eliminate water by-pass, making filtration more efficient.

The baskets can hold a total of 5.9 litres of media and can be stacked in the precise combination of layers that will work best for your aquarium. Each one is lined with a foam insert for effective mechanical pre-filtering. Instant-release T-handles let you lift and separate the baskets quickly and easily, making routine maintenance simpler.

Fluval FX4 also features Smart Pump Technology, which provides optimal filter performance. This advanced technological feature employs an electronic circuit board that continually monitors the pump. Impeller speed and force are constantly measured to ensure powerful output and energy efficiency. It also manages the filter's self-starting feature and evacuates air that may enter or build up within the filtration system. On a 12-hour cycle, the pump will pause and allow trapped air to escape, ensuring the best filtration efficiency at all times.

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