scraper is a multiple use blade cleaner. The 15 cm wide blade makes it easy to remove even the most resistant calcareous algaes from the aquarium glass. The removable blade protector also acts as a squeegee for cleaning the outside of the aquarium glass. A unique feature of the scraper is the hinge which allows the blade head to be turned through 180°. This facility allows the user to clean the aquarium even when the tank decoration, such as rocks or roots, are very close to the glass.