Convenient cleaning of the substrate: Regardless of water changes, the Eden 501 Gravel Cleaner removes detritus from the aquarium floor without disturbing the gravel or sucking it into the filter. Even hard-to-reach areas can be easily cleaned with the compact, transparent suction tubes. The water return feature allows dirt particles to remain in the filter sponge while the water is pumped back into the aquarium. This enables clean and thorough work without excessive water removal or overflowing of the bucket. The Gravel Cleaner comes with two suction tubes (Ø25mm/Ø13mm), hoses, and a mounting bracket. It can be combined with the Eden 114 Aqua In-Out Set to perform a water change simultaneously. Suitable for freshwater and saltwater aquariums.