Mineral Cartridge BIOGREEN  AAA Antioxidant Alkaline Antibacterial Filter easily converts regular tap water into clean, mineral rich, alkaline by the excellent many layer filter system. Antioxidant alkaline antibacterial Filter for Post Treatment of Water Purifier Add Minerals, pH Enhancer, Reduce ORP, Decrease NMR, Remove Bacteria Bio plus adds essential minerals which are generally removed by the R.O. Plant during the purification process. Further, it increases the dissolved oxygen, pH and alkalinity of wate