Description : 2231444357_6416937477 This product raises carbonate alkalinity without having an immediate impact on the pH. When for a long period of time there is a tendency to stabilize at 8.3 pH. Carbonates and calcium are essential to coral growth and growth will cease if either becomes deficient. If as directed; this product will not deplete calcium; magnesium or strontium which usually tends to precipitate with increasing alkalinity. Treats 16;000 gallons of water.