This high volume filter is excellent for large tanks. Filters at 350 gallons per hour and is rated for aquariums up to 200 gallons. This filter combines all the best features of all the other canister filters to give you a quality filter. Comes with a self priming button, extra large baskets for media, 360 degree rotating valves that disconect in a snap. These filters have become the leaders in the Japanese market! Comes complete with all filter media to get you started.