Code: AQ19025Two Part Balanced Ionic Supplement for Marine Aquariums Liquid source of calcium and buffer, with strontium, magnesium, and trace elements. Produces an ionic residual with the composition of natural seawater. C-Balance - A two part liquid supplement designed to make replenishment of calcium and buffering capacity easy. C-Balance replenishes calcium and carbonate alkalinity with the correct ratio of both major and minor ions. Two 473ml bottles