Pro Shrimp's comment: Extra strong cleaning magnet to keep your aquarium glass algae free. This magnet cleaner floats, so won't sink down to the bottom of your tank should it get detached from its outside handle.

• Cleans aquarium panes easily and thoroughly.
• If the inner part accidentally detaches, it will not fall into the gravel, but floats to the surface where it can be simply “caught“ using the external magnet.
• Also suitable for plastic panes (acrylic).
• Optically unobtrusive thanks to small size.
• For glass up to 4mm