... such as Activated carbon,Antiscalent balls, KDF, Ion exchange resin, Alkaline ball. 1)About Filter Media-Alkaline/KDF/Mineral:All kinds of Water Filter ... , NSF certified;Alkaline Ion Balls,pH value 7.5~8.5;Mineral Balls and Maifan Stones; Far Infar-red Ceramic Balls;Liquid Calcium Balls, Antiscalent Balls, etc ... and good service.3)Pictures of Filter Media: Filter Media-Alkaline/KDF/Mineral