Two part magnetic glass cleaner for aquariums How it works: An outer magnet stays outside the tank while an inner magnet with a cleaning brush follows along the inside glass as you move the outside magnet. This lets you scrub algae and stains without entering the water. Floating inner brush: The inside brush is buoyant and will not sink to the tank bottom, helping prevent loss or snagging. Strong magnetic performance: Provides reliable cleaning action with minimal effort, even on light biofilm and algae. Materials and build: Outer magnet with corrosion resistant coating and a durable nylon brush inside the tank. Designed to be safe for glass surfaces. Size and compatibility: Compact, easy to handle and control. Works with most glass aquariums. Not recommended for acrylic tanks. Check your tank glass thickness if you have unusually thick panels. Benefits at a glance: quick front glass cleaning, reach along edges and corners, reduces water disturbance, and helps maintain clear viewing panels with less manual reaching. Use scenarios: 1) Regular maintenance for the front glass of a home freshwater aquarium. 2) Cleaning algae in hard to reach spots on small desktop tanks. 3) Quick spot cleaning in larger tanks without removing fish or disturbing substrate. Care tips: Rinse the brush after use and dry before storing. the brush when bristles wear down.