Mineral water treatment uses quartz sand,Active carbon, RO, UV to filtrate water. Detailed Product DescriptionMineral water treatment uses quartz sand,Active carbon, RO, UV to filtrate water.pretreatment :1) first we draw out tap water by water pump, then get into the first filter , media filter. It content quartz sand, blind coal. It could filtrate colloid , suspended substances, seston, granule ...