1. Powerful Magnetic Design: Effortlessly clean your aquarium without getting your hands wet with this 2piece magnetic cleaner set. The strong magnetic forces work effectively through glass thicknesses of 5–12 mm, allowing you to control the internal brush from outside the tank. 2. DualBrush Functionality: Each cleaner features both hard and soft brush sides for thorough cleaning—the stiff bristles tackle stubborn algae, while the gentle bristles remove dust and dirt without scratching your aquarium glass surfaces. 3. Compact Size for Small Aquariums: Measuring 30 x 30 mm, these mini cleaning brushes are specifically designed for aquariums up to 30 gallons, making them the tool for desktop tanks, aquascapes, and small fish habitats. 4. Easy Handling and Control: The ergonomic design fits comfortably in your hand and offers maneuverability to reach corners and edges. Simply place the outer magnet against the tank to guide the inner brush precisely where needed.