Calcium Carbonate | MoreWine
Oct 06, 2018· Onequarter ounce (about 4 teaspoons) of calcium carbonate reduces acidity in one gallon by about %. ing may occur because of the production of CO2. Do not use more than one ounce per gallon. Wait 24 hours and rack wine. Calcium carbonate is also used in beer to increase the temporary hardness of water.