Fluval FX4 High Performance Canister Filter FishLFCategory_Replacement Lights Low-tracking crystals don't stick to

Low-tracking crystals don't stick to your cat's feet

Bright colors help keep pups engaged

rockfish and sole

Your cat will love pouncing

Fluval FX4 High Performance Canister Filter FishLFCategory_Replacement Lights Low-tracking crystals don't stick toBuilding 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). The FX Gravel Vac quickly connects to all Fluval FX4 and FX6 (2nd generation) canister filters for the ultimate convenience in powered substrate cleaning.