Eznsmart Aquarium Siphon Syphon Auto Fish Tank Vacuum Gravel Water Filter Cleaner Washer Pump 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.