4 Pounds Bulk Zeolite (Clinoptilolite) Aquarium Ammonia Remover 4 LBS Zeolite (Clinoptilolite) Aquarium Ammonia Remover Chips We Buy In Bulk And We Repackage According To Amount You Purchase. For Fresh and Salt Water Aquariums The best way to rid aquariums of ammonia--the deadliest killer of tropical fish. Removes Ammonia, the most prevalent cause of tropical fish loss. The presence of ammonia increases fishes susceptibility to disease and infection and drastically reduces their oxygen carrying capabilities. Creates a healthy environment for fish; minimizing foul odors and cloudy water conditions.