Protein Skimmer, Rotary Drum Filter, Pump manufacturer / supplier in China, offering High-Capacity Fluidized Sandbed Biofilter – Essential for Recirculating Aquaculture Systems (RAS), Aquaculture Essential Biological Filter: Core Equipment for Optimal Water Quality, Optimize Your Aquaculture System with Laswim Fluidized Sandbed Biofilters and so on.