Lee's The Ultimate Gravel Vac Clean/Drain and Fill Kit removes harmful waste from gravel, while performing routine monthly water changes. Attaches directly to sink, no more carrying pails of water to and from your aquarium. Includes manual valve to reduce water evacuation while cleaning and temporarily stop water flow into aquarium during filling. Lee's unique Fish-Saver Cleaning Claw protects expensive fish and plants from being drawn into hose during draining and cleaning of aquarium. During filling of the aquarium, the Fish-Saver Cleaning Claw acts as a shower head and softens the impact of water on fish and plants.