Aquarium Filter Media comes down to 3 categories – Mechanical, Chemical and Biological which helps by removing debris, toxins and housing beneficial bacteria. Having these set up correctly will help with maintaining a healthy aquarium for your fish to thrive in. The purpose of aquarium filter media is to have beneficial bacteria to house in there, converting Ammonia, ammonium and nitrite into less harmful nitrate through the nitrogen cycle. Nitrifying bacteria aerobic and denitrifying bacteria anaerobic are key in keeping your aquarium water healthy and reduce the amount of water changes needed. Choose from our range of filter media that will help to do this.