<b>Gypsum (Calcium Sulfate) - 8oz sealed pack</b> <br />Increases calcium and sulfate levels in water, adds softness to your brewing water, lower pH, and helps to settle proteins during the boil. Use a dosage as needed (usually 1 teaspoon per 5 gallons), as your specific water quality will vary depending on your location. Running a water report is an advanced brewing step and doing your own research through your local water utility is strongly advised