Fritz Aquatics ACCR Ammonia Chlorine & Chloramine Remover Water ConditionerAmmonia poisoning is the most common killer of aquarium fish. Dangerous ammonia levels often occur in new aquariums or in an established tank when adding new livestock, when a filter stops working due to power or mechanical failure, or if existing beneficial bacterial colonies are lost due to the use of medications or sudden change in water conditions. Fritz A. C. C. R. is a true complete water conditioner that not only neutralizes toxic ammonia but