The Fluval FX5 is a large capacity, multi-stage external canister filter system. 607 U.S. Gal. (2,300 L)/H, enabling precise management of water conditions for aquariums as large as 400 U.S. Gal. (1,500 L). A self-priming instant-start system that eliminates the need for manual siphoning. Unique click-fit AquaStop Valves that regulate water flow, rotate at 55 degree angles and allow for fast set-up and leak-proof maintenance. A purge valve that allows for partial discharge of debris without needing to move the unit. Multi-directional twin output nozzles to create specific water flows Fluval FX5 Smart Pump Technology (patent pending) ensures quiet, efficient operation. This self-priming system provides plug-in-and-start convenience. Lift-out stack of media baskets.