The Hagen A1414 is an ammonia remover that fits the following aquarium filter:
The Hagen AquaClear 50 Ammonia Remover - 3 pack removes harmful ammonia and nitrite from freshwater aquariums, reducing stress on fish. This Hagen AquaClear 50 is ideal for new or heavily populated freshwater aquariums. This Hagen Ammonia Remover comes 3 in a pack.
The Hagen A1414 specifications: