The 4-in-1 Scraper by Aqua One allows you to clean off the toughest and grimiest surfaces in and around your aquarium, ridding the glass of stuck-on algae and dirt. While using the sponges provided; an up and down scrubbing motion will quickly make the algae disappear when either sponge is flat to the surface. A scraper is available at the tip to assist any hard to scrub areas, while the opposite tip includes a prong for pulling out or moving around objects deep inside of your aquarium. One simple tool with many features can help you handle your aquarium cleaning-duties way easier than ever before!