Saiger Handle Design Magnet Aquarium Cleaner Glass Scrubber Aquatic Algae Scrapers Floating Clean Brush with Plastic Blade for Fish Tank Acrylic Cylinder - Blue White Magnet Aquarium Cleaners have two using modes-Rubbing aquarium tank and Removing algae, moss and dirt from the tank surface, come with a algae scraping blade, clean algae and scum from the inside of your aquarium easily Its Handgrip unique design, can provincial your effort and convenient to use, and its streamlined shape, you can comprehensively cleaning-up without blind angle This is a revolutionary magnetic aquarium cleaner, another unique because it floats, its buoyancy makes it easy to operate and is easily guided around corners without sinking, its Suspension design, you will be not afraid of sinking to the bottom of fish tank Another unique design is its strong neodymium magnetic forces, you can sensitively slide it from the inside wearable soft cleaning brush to follow the outside handle, also with its anti-scratching magic pad, not only can easily remove algae with the strong attracting magnets but also preventing scratching, not easily scratch your aquarium tank Please Note: The maximum thickness of glass Large Glass cleaner can handle is 12mm (0.4724 Inch). It is suitable for many aquarium tanks, like freshwater tanks, saltwater tanks, grass tank and acrylic cylinder