Bio-ceramic filter reduces impurities - chlorine, heavy metals, insecticides and other impurities * Eliminates bacteria (i.e. E.Coli, B.Subtilis, S. Aurene) and prevents bacteria propagation * Quickly re-mineralizes tap water with alkaline mineral cartridge * Adjusts and maintains a balanced pH value (pH 7.5 - pH 9) * 3-pack of replacement filters. Over 1,300 refills per filter!