Check the listing for details. 350 Large Glass Algae Magnet w/Scraper - MagFloat. Condition: New. Listed at 71.89 USD. The Mag-Float-350 Large Glass Aquarium Cleaner is recommended for use with glass aquariums up to 350 gallons with a surface thickness up to 5/8”. Product dimensions: (3-1/4" x 2-1/2" x 1") The Mag-Float cleaners contain special abrasive velcro pads that remove algae from the surface of your aquarium The scraper can be purchased separately for use with this Mag-Float-350 The Mag-Float 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 you also avoid toxic lotions or soap residue on your skin from getting into your aquarium water. Can be used on freshwater and saltwater tanks Magnet does not lose strength over time Scraper/blade sold separately Listing and template services provided by inkFrog