Review on 🐠 YCTECH Automatic Aquarium Gravel Cleaner: 6 Watt Filter for Cleaning Gravel, Filtration, Pro Sand Washing, Water Changing, Sludge Extraction, and Dirt Suction - Fish Tank Sand Cleaner by Leslie Clark

. It's 2 1/2 feet deep so I needed something to clear the bottom. I read reviews and watched videos. It is quiet and does not disturb the fish. they just studied, stood aside and watched. No hectic swimming and running around. The floor was cleaned and the filtered water returned to the tank. It's easy to use, but I advise you to watch 3 videos. Although it shows that it comes with an instruction book, it doesn't. I would buy this again.