Guangzhou Zhonghang Environmental Technology Co., Ltd was established in 2012 . It is engaged in circulating aquaculture system , raw water treatment systems, aquaculture projects , aquaculture engineering research . Our products include RAS, the protein skimmer , automatic filters , uv sterilizers, biological filter , ozone generator , oxygen generator , PP tanks ,water pumps , etc. We have professional and technical personnel to provide you with professional service you farming systems. Please feel free to contact us for more information.