... machinery, RAS equipment, RAS,Recircualtion Aquaculture System,Recircualtion Water Treatment System, Aquaculture equipment, Fish machinery, RAS ... , RAS machine.Recirculation aquaculture systemHuixin recirculation aquaculture system are using drum filter, protein skimmer, biological ... sort of water treatment equipments and water recirculating aquaculture systems(WRAS), it achieves cyclic utilization ...