The company takes natural river sands selected from Ganjiang River and Fuhe River as raw materials, processes medium coarse sands into 5 mesh, 10 mesh, 12 mesh and 14 mesh filter material quartz sands through screening and water washing. The company's conventional filter media and homogeneous filter media can meet the requirements of large, medium and small ordinary filter tanks, V-shaped filter, filter irrigation, reclaimed water reuse, etc