The alkalinity-bearing component of a two-part method for dosing calcium and carbonates (the substances largely responsible for increasing alkalinity (buffering capacity)) in the same ratio as that found in natural seawater. Ionically-balanced with respect to natural seawater concentrations of calcium and carbonates when used in equal amounts with Reef C?de A. Simplifies calcium and alkalinity maintenance. Contains no phosphate, silicate, or organic material. Stronger than most competing products. Formulated by a marine scientist.