For use on glass tanks up to 6mm (1/4") thickness or about 25 Gallons Scrub, Flip, Scrape, and Now *FLOAT* with FL!PPER Aquarium Cleaner! The Fl!pper Floating Nano Aquarium Cleaner is the last aquarium cleaning tool you will ever need! Flipper's patented design creates the only 2 in 1 aquarium cleaner that can FLIP from scrubber to scraper simply by rotating the handle. Complete cleaning without ever getting your hands wet! Flipper NANO Float Features - Now FLOATS to the top of your aquarium if the cleaner ever becomes detached for even easier retrieval. - New improved longer lasting handle pad surface * Made with rare earth magnets for incredible cleaning strength and durability.