JBL Floaty SharkFloating glass cleaning magnet for thick aquarium panes. Key Features: Convenient and effective cleaning for aquarium panes of max. 20 30mm thickness: cleaning magnet with floating internal element. Easy to use: float the internal element on the water at the edge of the aquarium tank, the external element will draw the internal element. Direct the magnet from the outside. Clean glass pane with circular movements. Patented edge protection: protection