With the JBL ProClean Aqua In-Out you must no longer work with buckets, because the water pump automatically siphons off water. A powerful water jet pump siphons water out of the aquarium even when the aquarium is located lower than the water outlet. After water has been drained, the pump is set to Refill aquarium. The unique Fish-Saver Cleaning claw protects expensive fish and plants from beeing 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.JBL ProClean Aqua IN-OUT Complete+ super practical complete set for partial water changes with bottom cleaning in aquariums of 45-70 cm height, with water jet pump for the tap+ easy to install: use the hose to connect the gravel cleaner (substrate cleaner) to the suction pump on the water tap. After siphoning the aquarium floor, move the lever on the tap pump to refill the aquarium+ automatic suction devic