HeroNeo&reg; Auto Electrical Aquarium Battery Syphon Fish Tank Vacuum Gravel Filter Cleaner Remove the dirty things from the bottom of your aquarium effectively. Supported two suction pipe sizes, suitable for both small and large aquariums. Also be used as a water siphon for water changes, or to empty your aquarium when you Connect a hose to outlet. Adjustable height. Hose & Filter bag included. Maximum water depth 52cm. Flow rate 520 l/h.