Brewing CALCIUM CHLORIDE is hydrated calcium chloride used to correct mineral deficiencies in water which is to be used for brewing. It is used in de-mineralized or soft to medium hard water to increase permanent hardness. It will help establish proper pH of the mash and the wort and provide sufficient calcium ions essential for enzyme function, kettle protein coagulation and yeast metabolism Cheese making: Improves curd size and texture when using store bought milk. One teaspoon will treat 2 gallons of milk. 30% solution. To compensate for the processing of store bought milk, add calcium chloride prior to adding rennet to the cheese mixture. The addition of calcium chloride will help restore the altered milk protein and aid in the development of a quality curd.