Gypsum (Calcium Sulfate), use 1/4 to 1/2 teaspoon per 5 gallons to lower pH, increase hardness, and add hop-enhancing sulfates.
$1.39
In stock (available)
Gypsum (Calcium Sulfate), use 1/4 to 1/2 teaspoon per 5 gallons to lower pH, increase hardness, and add hop-enhancing sulfates.
