Gypsum (2 OZ)
If you have soft water and are brewing a hop forward beer, you’ll want some Gypsum on hand.
Gypsum (calcium sulfate) is used to add permanent hardness to your brewing water in the form of calcium ions, which will increase the hop perception in your beer.
It increases calcium and sulfite levels in Soft water, increases acidity, and helps to settle proteins during the boil.
1 gram of Calcium Sulfate in 1 gallon of water changes the salt levels by 61.5 ppm calcium, 147.5 ppm sulfate and adds 153.5 ppm to the hardness.
Brewers that use distilled, or RO, water like to add some gypsum back into the water to give it some hardness.
Gypsum can also be used to lower the pH of water. Use 1 teaspoon per 5 gallons.
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