Calcium Carbonate (Chalk) - 2 oz

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Because of its limited solubility it is only effective when added directly to the mash. Use for making dark beers in areas of soft water. Use nomograph and monitor the mash pH with pH test papers to determine how much to add.  Concentration at 1 gram/gallon is 105 ppm Ca+2 158 ppm CO3-2 .

Raises pH.  Use up to 1/2 teaspoon per 1 gallon before fermentation.