The Fluval FX Series Canister Filters represent the gold standard in high-performance aquarium filtration. Designed and manufactured in Italy, the FX line combines massive flow rates, intelligent automation, and multi-stage filtration into some of the most powerful and reliable canister filters available. Each FX filter features Smart Pump™ technology, which uses an advanced microchip to continuously monitor performance, self-start the system, and automatically evacuate trapped air every 12 hours for maximum efficiency. All FX models include mechanical, chemical, and biological media, stacked in removable baskets that eliminate water bypass and ensure consistent filtration. Suitable for freshwater and saltwater aquariums, the FX Series is ideal for heavily stocked tanks, large fish, messy eaters, and aquarists who demand top-tier water quality with minimal maintenance. Common FX Series Features (All Models) Smart Pump™ with self-starting and air-purge automation Multi-stage filtration with all media included Removable, stackable media baskets (no water bypass) Aqua-Stop valves with leak-proof Click-Fit system Valves angled at 45° for easier installation Anti-clog telescopic intake strainer Adjustable multi-directional output nozzles Rubberized feet for quiet operation Designed for freshwater & saltwater aquariums Made in Italy FX2 Canister Filter For Aquariums up to 175 gallons (750 L) Flow Rate: 475 GPH (1800 L/h) Media Capacity: 1.0 gal (3.9 L) Compact, space-saving design Same height as FX4, 15% smaller overall Fits easily inside standard cabinetry Most affordable FX Series option FX4 Canister Filter For Aquariums up to 250 gallons (1000 L) Flow Rate: 700 GPH (2650 L/h) Media Capacity: 1.0 gal (3.9 L) Easy water changes via utility valve (hose kit sold separately) Compact 16.5" tall design fits under most aquariums Bridges the gap between Fluval 406 and FX6 FX6 Canister Filter For Aquariums up to 400 gallons Flow Rate: 925 GPH (3500 L/h) Media Capacity: 1.5 gal (5.9 L) Improved motor uses 10% less electricity than previous generation Easy water changes with purge valve & drain hose Tall 21" design for maximum filtration capacity Documentation Fluval High Performance Canister Filter — Instruction Manual (PDF) Product Video
