Seachem's 3 in 1 Algae Scraper is an efficient, safe, and reliable scraper for both glass and acrylic aquariums. Featuring three retractable blades, metal, plastic, and a durable soft pad, this scraper is colored white to give you the contrast to easily see how much you're cleaning. This lightweight scraper features ergonomic handle, making it comfortable to use in a wide variety of positions and angles. This scraper is also designed to float, making it easy to retrieve when dropped or released in the aquarium.