... rate:0.3%; 4.clay content:0.5% •IntroductionQuartz Sand is manufactured from natural quartz stone,it 's high content ... 1%Solution) 7.0 Hardness(Mohs) 7.7 •ApplicationQuartz Sand Filtration has been widely and largelyused for the water treatment ... Filter Media,Walnut Shell Filter,Manganese Sand Filter,Quartz Fiter Sand,Ceramic Filter Sand,Biological Particulate Filters. For more details,please feel free ...