Water Conditioners » Chlorine & Ammonia » Ammo-Rocks 10 lb.

PondCare Ammo-Rock Biological Filter Media

100% natural zeolite removes toxic ammonia and develops a larger and more active biological filter helping to keep your fish healthy. Working through an ion exchange process the rocks act like sponges that attract toxic ammonia and soak it up. Use one 10 lb. bag for every 300 gallons of pond water.