Click to expand Tap to zoom Mangrove Jacks Calcium Carbonate 100g Save $0 Save $-9 Original price $9 - Original price $9 Original price $9 $9 - $9 Current price $9 | / Quantity Add to cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. Calcium Carbonate is used to raise pH levels. Generally used for making dark beers.