Fast Cleaning BrushStrong magnetic aquarium cleaner helps you to scrape the algae off the fish tank quickly and completely just drop the scraper side into the water no hands get wet and no damage to corals you will love the feeling of scraping the algae off tank.FLOATING DESIGNThe internal floating avoids the brush sinking in the bottom of aquarium It floats in water and never sinks to the bottom of the tank if separating makes it convenient to take it out of the tankMULTI-PURPOSE USAGEAquarium glass cleaning brush can be used not only in the aquarium but also for cleaning windows glass doors and other glass or various fish tanks that will not be demagnetized such as acrylic, glass or plasticALGAE SCRAPERInstall a sharp blade as algae scraper in the head of the brush which easily removes stubborn marks, even if around corners The inside anti-scratch cleaning pads cleans fast and efficiently without scratching the aquarium glassHow to avoid scratchesgenerally this aquarium cleaning brush will not scratch the tank but it may cause scratches if the blade gets defects or it picks up small pieces of sand or gravel pancaked between the sides during a flip So please inspect the blade before use dont use it near sand clean the brush timely after use