Fluval FX4 High Performance Canister Aquarium Filter

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.