Powerful magnet system Industrial-strength neodymium magnets generate 3.2 kg of cleaning force, effectively removing stubborn calcium deposits and green algae with smooth, effortless passes. Safe for all glass thicknesses from 3 to 19 mm. Intelligent floating outer handle design The floating outer handle rises to the water surface when released, so you never lose it underwater. It features an ergonomic, non-slip grip that stays dry during cleaning, eliminating wet hands and dropped tools. Reversible scrubbing system The outer unit has two cleaning surfaces. The ultrafine polishing pad on one side provides regular maintenance cleaning, while the structured nylon bristles on the other side tackle tougher algae. Easily switch cleaning modes without disassembly. Fish-safe materials Magnets are protected by a rubberized coating to prevent tank scratches, while avoiding electrical or harmful hazards. Absolutely safe for all freshwater and saltwater ecosystems. Compatibility and performance Designed for glass tanks 3–19 mm thick, delivering effective cleaning across a range of aquarium sizes and conditions. Use scenarios - Regular glass cleaning to maintain clarity and remove light algae buildup during routine maintenance. - Targeted removal of stubborn calcium deposits and tougher algae in hard-to-reach areas. - Suitable for both freshwater and saltwater aquariums, including larger tanks with standard glass thickness.