Mag Float aquarium glass cleaners are the original “floating” magnet cleaners designed and patented by Bakker Magnetics in The Netherlands. The use of neodymium (rare earth) magnets ensures a powerful magnetic attraction between the inner and outer halves of the Mag-Float cleaner, leading to far less chance of separation from the glass. Some Mag-Float sizes have side rails to allow fitting of Mag-Scrape stainless steel blades for easier removal of stubborn algae and coralline algae. Fitting a Feeding Clip is a further option.Mag-Float has an updated website where you can find further product information. Click on the images.