Gypsum [Calcium Sulphate] 2 oz

Calcium Sulphate (Gypsum) | Various Sizes

Gypsum or calcium sulphate, increases hardness in brewing water. When brewing with distilled water, brewers favor gypsum as a way to replace hardness in the boiling water and can even be used to decrease the pH level of the water.

Use 1 teaspoon per every 5 gallons.