When it comes to filtration systems for the aquarium, the mechanism of the system is important, but not as important as the actual filter media that does the hard work. The filter media determines the kind of unwanted materials that get filtered out. Thus, a single filtration system can be used as a mechanical, biological, or chemical filter, depending on the media used.
If the biggest problem in your aquarium is ammonia, it makes sense to use a filter media specifically targeting ammonia. Take note that ammonia in high levels is toxic to fish and corals, so it's important to remove it - or at least, keep it minimal - in your tanks.
If you want to remove ammonia from your tanks, make sure to use the Hagen Fluval Ammonia Remover Filter Media from Pet Store. You don't have to replace your current filter media to use this one - simply add it over your existing media for a more potent and powerful combination. It will catch the ammonia released by broken chloramines bonds.
The Hagen Fluval Ammonia Remover Filter Media does not affect the water by releasing back the ammonia it catches. However, it should be used only in freshwater tanks, and not saltwater.
Ammonia Remover removes ammonia before it can harm fish. An effective addition to normal filter media, it reduces unacceptable levels of ammonia. In chloramine treated water, it helps remove excess ammonia created when the chloramine bond is broken to release free ammonia. Ammonia Remover should be used exclusively in freshwater as its ionic functions release captured ammonia in brackish and saltwater. Ammonia Remover does not show any physical change as it loses its activity, which is determined by the amounts of ammonia it contacts. Ammonia Remover should not be left in the filter longer than a month.
*For freshwater use only