The Fluval EDGE Gravel Cleaner is a convenient and effective tool for cleaning and maintaining a spotless aquarium. It features an easy-start valve that automatically begins siphoning by a simple up and down motion in the water. As you clean the aquarium, the gravel cleaner generates a continuous flow of water that effectively sucks up dirt and debris and returns clean gravel back to the bottom of the aquarium. Dirty water is expelled into a bucket. The gravel cleaner comes with two cleaning attachments that allow precision cleaning: a gravel head for deep cleaning and a slim nozzle head for hard to reach areas. The precision heads are especially effective in planted and decorated aquariums. The gravel cleaner features an exclusive gravel guard that prevents gravel from clogging the tube.