Aquarium owners, this magnetic cleaner is an absolute game-changer for keeping your glass crystal clear without getting your arms wet! The super powerful magnets hold securely through glass up to 12mm thick (that's about 1/2 inch), so it works on most standard aquariums without slipping off. The floating design is genius - if the inner part accidentally detaches, it floats to the top so you can easily retrieve it without fishing around blindly. The ergonomic grip on the outer piece feels comfortable in your hand, and the paint coating provides a secure hold even when your hands are wet. They've really thought through the angles - it moves smoothly across the glass with minimal effort, making algae cleaning a quick five-minute task rather than a chore. Just remember - this is for GLASS tanks only, not acrylic, since the magnetic strength could damage acrylic surfaces. The two-part system means you never have to disturb your fish or decorations to clean the inside glass - just move the outer piece and the inner cleaner follows along, scrubbing away algae as it goes. Much better than those awkward long-handled scrubbers that never seem to reach properly. Whether you have a small desktop tank or a larger display aquarium, this magnetic cleaner makes maintenance so much easier and keeps your viewing experience perfect. One of those simple tools that instantly improves your fishkeeping routine!