Hydor Professional External Canister Filter Media, Zeolite
Hydro Zeolite is a powerful, ultra-pure natural adsorbent for freshwater aquariums. Ammonia can be quickly trapped through the high ion exchange capacity. Hydro Zeolite helps to eliminate dyes, drug residues, microscopic algae and odors, quickly restoring aquarium water quality. It does not release phosphates, heavy metals or other substances that are harmful to aquatic life.