Hagen Marina Algae Magnets for glass aquariums allow the cleaning of inside glass walls without getting your hands wet! The Algae Magnet works similarly to the Mag Float, using a powerful magnet on the outside to guide the cleaning magnet inside.
Both magnets exert powerful attraction to ensure a tight, secure grip. The inner magnet features a non-abrasive cleaning pad that will not scratch or damage the glass. Safe for fresh or saltwater aquariums.
Note: Use on glass aquariums only.