Aquarium owners, this Seachem replacement cartridge is exactly what you need to keep your tank glass crystal clear! The 3-in-1 design is seriously clever - you get a plastic scraper for tough algae on glass tanks, a safe pad for acrylic aquariums that won't scratch, and a blade attachment for really stubborn buildup. It fits both sizes of Seachem algae scrapers and retracts safely when not in use. The blade is fantastic for scraping off hard green spot algae and other tough growths, while the pad handles lighter cleaning without risking scratches. Just remember - only use the plastic scraver and pad on acrylic tanks, not the blade! It works perfectly in both freshwater and saltwater setups. The cartridge measures about 4x8x9 inches packaged, and it's made in Italy with that quality Seachem is known for. Whether you're dealing with daily film algae or monthly deep cleaning, having the right tool makes maintenance so much easier and keeps your fish happy with a clear view of their world!