Dymax

Dymax Anti-Ammonia Rock is a natural filter media capable of absorbing Ammonium, Nitrite, Nitrate in water rapidly, keeping aquarium fish tank and ponds safe for fishes. Suitable for use in freshwater aquariums and ponds, these anti-ammonia rocks. Helps remove ammonia rapidly while maintaining the aquatic pH value. Removes unpleasant odours and prevents fish life from being poisoned by unsanitary water.