Gypsum (calcium sulphate) is used to harden water. It will decrease the pH level, making the water more acidic. It is used mainly in stouts.
Usage: 1 teaspoon per 5 gallons.
Calcium Sulfate. Used to add permanent hardness (Calcium ions) to brewing water. 1 gram in 1 gallon changes the salt levels by 61.5 ppm calcium, 147.5 ppm sulfate and adds 153.5 ppm to the hardness.
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Gypsum – 1 LB
Calcium Sulphate. Use one teaspoon of gypsum per five gallons.
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Gypsum adds hardness to brewing water. Use 1-2 teaspoons per 5 gallons. 1 gram of gypsum adds 62 ppm of calcium and 147 ppm of sulfate. Gypsum is also used to lower water pH.
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