Calcium Sulfate (CaSO4) aka Gypsum, adds hardness to soft water that is low in sulfate. Gypsum will also lower the pH of water while adding a “crispness” to the hop bitterness. If using distilled or reverse osmosis water, adding gypsum will increase hardness. Use up to 1 teaspoon per 5 gallons.
Adding 1 gram of calcium sulfate to 1 gallon will add approximately:
– 61.5 ppm (parts per million) of Ca+2
– 147.4 ppm (parts per million) of SO4-2
jonathon_cain (verified owner) –
1 LB is a lot of calcium sulfate but this is by far the best deal I have seen