The tetra gs 45 aquarium glass scraper effortlessly removes algae and other dirt from aquarium glass the 25cm stainless blades are easily replaceable replacement blades supplied and the jointed blade holder bends to any angle for those awkward corners the lateral blade edge is shielded to prevent cutting into any sealed parts the tetra gs 45 aquarium glass scraper at a glance simple effortless cleaning cleans every corner with hinged blade holder prevents cutting into glass bonding incl