Building on the mighty FX performance and reliability platform, the all new FX4 high performance canister filter is a compact 'little brother' to the FX6. The FX4 bridges the gap between the Fluval 406 and the FX6 canister f...

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Building on the mighty FX performance and reliability platform, the all new FX4 high performance canister filter is a compact 'little brother' to the FX6. The FX4 bridges the gap between the Fluval 406 and the FX6 canister filter, making it an ideal choice for aquariums up to 250 US Gal (1000 L).

  • Enhanced Performance: Multi-stage filter pumps out 700 US Gal (2,650 L) of water per hour, with the patented Smart Pump advanced microchip technology continuously monitoring and optimizing pump performance.
  • Self-Starting: Just add water, plug in and Smart Pump technology will take over. Any trapped air is auto-evacuated every 12 hours to ensure maximum efficiency.
  • Multi-functional Utility Valve: Drain at the base makes it possible to empty the canister and perform seamless water changes by draining and refilling water directly from it. Convenient lid-mounted hosing clips offers clean storage when not in use.
  • 4-Stage Filtration: Four removable filter baskets eliminate water bypass and hold up to 1 US Gal (3.9 L) of media: mechanical, chemical, and biological. These baskets enable you to stack in the precise combination that will work best for your aquarium.
  • Compact and Quiet Design: FX4 canister filter stands 16.5” (42 cm) tall and easily fits under most aquariums. Unidirectional impeller has fewer mechanical joints for reduced noise. Rubber feet reduce vibration and add stability.
  • Enhanced Performance: Multi-stage filter pumps out 700 US Gal (2,650 L) of water per hour, with the patented Smart Pump advanced microchip technology continuously monitoring and optimizing pump performance.
  • Self-Starting: Just add water, plug in and Smart Pump technology will take over. Any trapped air is auto-evacuated every 12 hours to ensure maximum efficiency.
  • Multi-functional Utility Valve: Drain at the base makes it possible to empty the canister and perform seamless water changes by draining and refilling water directly from it. Convenient lid-mounted hosing clips offers clean storage when not in use.
  • 4-Stage Filtration: Four removable filter baskets eliminate water bypass and hold up to 1 US Gal (3.9 L) of media: mechanical, chemical, and biological. These baskets enable you to stack in the precise combination that will work best for your aquarium.
  • Compact and Quiet Design: FX4 canister filter stands 16.5” (42 cm) tall and easily fits under most aquariums. Unidirectional impeller has fewer mechanical joints for reduced noise. Rubber feet reduce vibration and add stability.

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