The Reef Code B Balanced Calcium & Alkalinity System Part B is a vital component in maintaining the ideal water chemistry for marine aquariums, specifically designed to balance calcium and alkalinity levels. This two-part method ensures that the substances responsible for increasing alkalinity are dosed at the same ratio as found in natural seawater, making it an essential tool for keeping pH and KH (carbonate hardness) stable. Unlike single-component products like sodium carbonate, Reef Code B is a multi-component buffer that regulates pH automatically and adds multiple major, minor, and trace minerals beneficial to reef-building organisms.