Description 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!