The Aqua One Gravel Cleaner 16\"" is a perfect slim profile for constricted and hard to access places. This innovative piece of equipment will clean your gravel of waste substances.\n\nThe Aqua One Vac-A-Tank Gravel Cleaner, like every other Vac-A-Tank gravel cleaner, is designed to be user friendly since it has a self-starting syphon model. Use the Vac-A-Tank gravel cleaner as an aid to your vital hassle-free routine water changes and tank cleaning as an effortless chore. During your partial water change, as the water is exiting your aquarium, simply plunge the gravel cleaner into the gravel whilst the natural siphoning actions of the water extracts the dirt and carries it up the tube and out of the aquarium.