All Algae Free magnets are made with Neodymium Rare Earth Magnets, one of the strongest magnets in the world!
The Piranha Float will make algae cleaning quick and easy. With its large 4" x 2" cleaning area and extra strong magnets, it will zip through the toughest of algae. Its floating inner assembly will float to the surface if disengaged for easy retrieval.
US Patent 6,634,052 and US Patent 6,348,104
This cleaning magnet is for glass and acrylic aquariums 1/4" - 3/8" (6 - 10 mm) thick.