These Interpet Algae Cleaning Magnets are an easy solution to effectively remove algae from inside of the aquarium walls. The magnetic design uses magnetic attachment for easy algae removal without wet hands or disturbing fish. It is efficient for cleaning, specially designed to effectively remove algae and grime from glass or acrylic aquarium surfaces. The compact size is perfect for small aquariums, providing efficient cleaning in tight spaces. Durable construction built with high-quality materials for long-lasting performance and reliability. Size small, suitable for aquariums up to 65 litres or thickness up to 6mm.