Check the listing for details. 130A Medium Acrylic Algae Magnet - MagFloat. Condition: New. Listed at 35.59 USD. Acrylic aquarium cleaner Recommend to be used on aquariums up to 125 gallons with a surface thickness up to 3/8” Product dimensions: (3 7/8” x 1 3/8” Easy removal of algae from glass/acrylic surfaces No longer knock over decorations, damage corals and invertebrates No longer get your hands submerged into the water of the fish tank Time/money saver on maintenance Large cleaning surface area makes the job quick and efficient Stays free of debris Can be maintained attached to aquarium surface Strong, high-quality neodymium rare earth magnets Available for glass and acrylic aquariums Can be used on freshwater and saltwater tanks Magnet does not lose strength over time Easy retrieval of inner magnet Listing and template services provided by inkFrog