... Hardness 6 3.Adsorption rate 100% Lightweight High-quality Ceramic Particles Ceramic filter with high-quality clay, clay, solvent viscosity ... , uniform, surface roughness, porous, well-developed internal porosity, large surface area, strong adhesion to biological bacteria, breed quickly, ... of domestic Advanced level, the work cycle is long, large water production cycle, typically 500-1000m / m.2. ...