Emperor 280/400 Filter Cartridge 2pk by Marineland

The preassembled Emperor Cartridge filters water through a 44-square inch pad. made of double thick polyfiber, it traps more waste and dirt particles. Inside, each disposable cartridge contains two full ounces of Black Diamond Activated Carbon. It works longer and faster to absorb harmful pollutants which discolor aquarium water and cause odors. It's better than a bag! Just shake and rinse. The patented ribbed back design evenly distributes carbon for maximum water-to-carbon contact. No "tea bag" effect...just crystal clear, crystal clean water. Does mechanical and chemical filtration.