Algae Scraper 22" Medium Cleaning rod with interchangeable tools scrapes algae, removes wastes & polishes aquarium surface. ( Ergonomic grip for comfortable use. Polisher: Clean and polish your aquarium with ease, even curved surfaces by turning the polisher 90 Shovel: Remove fish wastes, food remnants and other undesirable objects. Scraper: Remove algae from your aquarium without fear of scratching the surface.