K1 media is engineered in a wheel shape with near neutral buoyancy allowing the media to circulate in a moving bed with only a minimal water flow.Maturing K1 media is important because a delicate eco-system is naturally developing for the bacteria involved in the nitrification process. K1 media provides a high available surface area for the bacteria to colonise more than other types of static media. It is this process which removes harmful ammonia and nitrite from the water. It is consistently regarded as the number one filter media is for use in all types of waste water treatment filtration ideal for use in moving bed filters provides a large surface area for bacteria to colonise and dramatically increases the efficiency of a filter.