Our Aquarium Scraper is a multi use blade cleaner. The approximately 6 in. wide blade makes it easy to remove even the most resistant calcareous algae 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 up to 180 degrees. This feature allows the user to clean the aquarium even when the tank decoration, such as rocks or roots, are very close to the glass.