Marketing InformationOne of the most affordable whole house treatment methods for acidic water is a calcite up-flow Neutralizer. This type of pH water filter system includes a tank that contains calcite, a form of calcium carbonate or a blend of calcite and magnesium oxide. Water flows into your home from a well or municipal water system and into the tank. Calcium carbonate is commonly used to neutralize acids and as the calcite is slowly dissolved into the acid water, it raises the pH.