Helps to remove ammonia and nitrate Can be used in all types of pond filters Increases efficiency of filters Can be used in moving bed filter systems High surface area to allow for more bacteria to colonise. Perfect for use with Evolution Aqua EazyPod and Nexus filters.. Provides 500cm2 of Surface Area for every 1m3 of K1 media used, Weight: 0.551155655 pounds, Manufacturer: Evolution Aqua