Granular Anthracite Coal Filter Media are made from high-quality raw coal and selected, broken, and sieved twice. The Granular Anthracite Coal Filter Media has good appearance glossiness, ball shape, high mechanical strength, good compression resistance, stable chemical properties, no toxic substances, and wear resistance. Granular Anthracite Coal Filter Media does not dissolve in acidic, neutral, or alkaline water. In addition, the anthracite particles have rough surface, good adsorption capacity, high porosity (â?¥52%), and high pollution-bearing capacity. Granular Anthracite Coal Filter Media can save a large amount of backwash water and electricity due to its light weight and low backwashing strength.