Floating magnetic aquarium cleaner essential for routine maintenance keep your hands dry while you scrub away nuisance algae the easiest way to remove algae for simple aquarium maintenance mag-float? Essential tool for convenient aquarium maintenance - magnetic algae scraper scrubs away algae and film without ever getting your hands wet. Having a mag-float on hand is as essential for aquarium maintenance as keeping a net and bucket near your aquarium. Scrub away algae without ever getting your hands wet, thanks to its clever magnet-on-magnet design.