The Coralife BioCube Algae Cleaning Magnet, with its weighted scrubber, cleans thoroughly and makes retrieval simple. When disconnected it falls straight down and rests above the gravel for easy retrieval. For curved glass aquariums up to 29 gallons or 1/4" thickness. Will work with the Coralife NEW STYLE Size 32 LED BioCube Aquarium and the Coralife NEW STYLE Size 16 LED BioCube Aquarium. For GLASS aquariums only. Includes two halves of magnets and the replaceable cleaning pad. 3" X 1.5" X 2.5".