Aqua Stainless Scraper Removes algae, calcium deposits, water stains, and other dirt from glass aquariums and glass cages. *For glass aquariums and glass cages only. Not for use with acrylic aquariums. White holder makes it easy to see algae and dirt. The holder is white. It stands out in the water, making it easy to see algae and dirt. Wide blade for improved work efficiency. The blade is approximately 105mm wide. It removes a wide range of dirt at once. Furthermore, it weighs only 61g, so you can work for long periods of time without fatigue. It removes dirt so cleanly, it's amazing! I've only used it a few times, so it's almost new, but please understand that it's a used item as it has been stored at home. Immediate purchase is okay.