White Diamond® Media Clinoptilolite Zeolite Ammonia Neutralizing Crystals

50 oz- Remove ammonia from your aquarium with these ammonia neutralizing crystals. Ideal for all freshwater aquariums and ponds. White Diamond removes up to 4 times more deadly ammonia to keep water clean and fish-safe. It protects against sudden ammonia "spikes" and helps control the presence of ammonia...especially during the break-in period.