Keep your turtle’s tank clean and safe from toxic ammonia levels with Zoo Med Turtle Clean 50/75 External Canister Filter Media. This filter media is designed to help absorb and eliminate ammonia waste and other harmful organics from your aquarium water. It’s made with high-quality carbon and is great for use in any 50/75 external canister filter (sold separately). Along with regular water changes， this media helps reduce unwanted odors and keep your tank looking crystal clear.