Tetra GC Gravel CleanerLong hose length and two fixation clips High speed starting valve to suck up the water Protective grid prevents fish or gravel from being sucked off Innovative control knob reacts to all movements of the gravel cleaner without kinking the tube Triangular suction pipe construction enables the cleaning of all inaccessible areas and zones close to the aquarium glass Contoured handle for easy, safe use Can be used to drain the aquarium completely