... 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 ... Anthracite Filter Media,Walnut Shell Filter,Manganese Sand Filter,Quartz Fiter Sand,Ceramic Filter Sand,Biological Particulate Filters. For more details,please ...