Seachem denitrate removes nitrates nitrites ammonia and organics from both fresh and marine waterr the high porosity of denitrate supports the proliferation of both aerobic and anaerobic bacteria that further remove these toxic aquarium by products even when exhausted as an organic adsorbent denitrate continues to be an excellent support for the biological filter and does not have to be removedr directionsr for best results denitrate should be placed to assure the flow of water thro