'pHealthy' Alkaline RO Water Purifier is the all in one water purifier. The pHealthy Alkaline Filtration changes the acidic RO water into a perfectly ph-balanced ANTIOXIDANT ALKALINE water. The Alkaline filter simply gives back minerals such as calcium, magnesium, sodium, potassium ion, which were taken away while purifying the water. This filter improves the qualities of clean water by adding necessary for proper human development and health minerals, such as Calcium, Magnesium, Sodium, Potassium and others readily found in many natural mineral waters.