CLEAN YOUR FRESH OR SALT WATER TANK IN HALF THE TIME!Quick, Easy and Hands-Dry! 2-In-1 Magnetic Aquarium Fish Tank Algae Cleaner | Scrubs, Scrapes, Flips and Now FLOATS! For Use On Glass Tanks Up To 24mm (1") Thickness. Floating Flipper 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. Cleans even the most stubborn coraline algae *Blade side has only 3 contact points resulting in a safety gap between the cleaner and the glass. This minimizes the chance of trapping sand, and thus reduces the chance of scratching, even when cleaning below the sand *Unique orienting buoyancy always keeps the magnets facing the glass for easy retrieval *It is recommended to replace blades every 3-6 months to maintain optimal algae scraping INCLUDES REPLACEABLE BLADE(S): Stainless Steel for glass tanks and/or ABS plastic for acrylic tanks.