Flyshine Aquarium Fish Tank Magnetic Floating Glass Cleaner Cleaning Brush Scrubber Floating design avoids lost magnets on the bottom of your aquarium Arc angle design makes it easy to clean the fish tank corners Humanized design gives a comfortable and relaxed hand feeling Large cleaning surface area makes the job quick and efficient Can be used in freshwater and saltwater, recommend to be used on 0.8-1.5m length fish tank with 8mm-14mm glass