Remove the algae from fish tank is the regular routine to keep your tank clean and beauty. ISTA Multilayer Algae Scraper is a fine and durable tool to help you to scrub away algae or other impurities from your tank, no matter in freshwater or saltwater. The scraper"s blade is made by 11 pieces soft PVC; when scraper moves once, it scrapes 11 times by the multilayer PVC blade. It is very efficient tool to help you to peel the algae and filth right off. It is good quality of PVC blades which won"t scratch your acrylic tank or glass tank. The white PVC blade can help you to check your tank is clean or not for any tiny area in your tank. Ergonomic handle and shaft provides significantly control and leverage. All parts can float to let you pick up your scraper easily when it drops.