A water ionizer which is also known as an alkaline ionizer is an system which claims to raise the pH of drinking water by using electrolysis to separate the incoming water stream into acidic and alkaline components. The alkaline stream of the treated water is called alkaline water. Alkalinity is a measure of the capacity of water to neutralize acids. Alkalinity is primarily due to the presence of bicarbonate, carbonate, and hydroxide ions. Alkalinity acts as a pH buffer to deactivate acidity. Water with high alkalinity may have an offensive taste. These filters are tanks filled with a media blend of calcium and magnesium carbonates made from naturally occurring minerals. The media slowly dissolves into the water, raising the pH and making it less corrosive. One of the most important benefits of alkaline water is that it lowers Oxidation Reduction Potential. Put in a Alkalizer/Ionizer, Mineralizer and Oxidation system to raise your pH, and also get great tasting water.