Bosvision ISAT Multilayer Algae Scraper, easy to remove algae and will not cause any scratch in your acrylic tank or glass tank. Lightweight and floating design multilayer PVC blade scraper The 11 layers PVC blade can remove the algae efficiently for all kind of fish tank. High quality PVC blade will not cause any scratch in acrylic tank. PVC blade can be unloaded easily for cleaning and maintenance. The white PVC blade can help you to check the tiny area is clean or not in your tank. Ergonomic handle and shaft provide good leverage to grip.