Fluval FX4 Canister Filter

Building off the high-performance FX platform, the all-new FX4 canister filter bridges the gap between the Fluval 406 and the FX6 canister filters, making it an ideal choice for aquariums up to 250 US Gal (1000 L).

Designed for aquariums up to 400 gallons, FX6 is the high-capacity workhorse of Fluval’s canister lineup, enhanced with all the power and reliability you’ve come to expect from a high-performance filter.