The perfect Biological Filter Substrate made from 100% Zeolite!
- Natural ion-exchange resins trap the toxic ammonia on the surface of the Ammo-Rocks.
- The growth of Nitrifying Bacteria is stimulated by the high surface area concentration of ammonia.
- The Nitrifying Bacteria grow faster and produce larger and more Active Colonies in the Pond Filter.
- 10 lb bag.
