# Fluval FX External Filter FX4

## Fluval FX External Filter FX4

  
  
    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

## Details

- **Price:** 247.99 GBP
- **Vendor:** Fluval
- **Type:** Fish : Filters : External
- **Tags:** External, Fish Pumps & Filtration, Fluval

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 247.99 GBP | In stock |

## Images

- Fluval FX External Filter FX4 by Fluval shown in packaging, highlighting features and specs.

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> Source: [Pet n Pony](https://petnpony.co.uk/products/fluval-fx-external-filter-fx4)
> Updated: 2026-04-20