Mag-Float Floating Glass Aquarium Cleaners Float-30

The Mag-Float revolutionary patented floating aquarium cleaner removes algae from your aquarium without getting your hands wet. Super convenient floating center, cleans aquarium surfaces and floats when the inner magnet separates from the outer magnet. Because you never have to reach into the aquarium, not only can you stay clean and dry, but also avoid toxic lotions or soap residue on your skin from getting into your aquarium water. Mag-Float Medium is recommended for aquariums up to 30 gallons with a surface thickness up to 3/16".