石英砂濾料:有純淨水濾料和污水濾料,純水濾料SiO2≥99—99.5% Fe2O3≤0.02—0.015%,粒度常用32-50mm,16-32mm,8-16mmm,4-8mm,2-4mm,1-2mm及0.5-1mm.污水濾料SiO2≥96—99% Fe2O3≤0.2—0.05%,常用粒度為0.2-0.5mm,0.5-1.2mm1-2mm其它同上