The Hagen A1412 fits the following filters:
The A1412 - AquaClear 30 Ammonia Remover Filter 3-Pack fits the AquaClear 30 Power Filter. This three pack of filter inserts removes and controls harmful ammonia and nitrite in new or heavily populated freshwater aquariums. The AquaClear ammonia filter reduces stress on fish in aquariums.
A1412 - AquaClear 30 Ammonia Remover Filter 3-Pack specifications: