Youngs Calcium Sulphate Gypsum 100 gram tub
Calcium is a very important mineral in the brewing process for its effect on mash and wort pH. Calcium Chloride and Calcium Sulphate (Gysum) are used to lower the pH, increasing the acidity.
Water is an important ingredient in beer brewing, its composition has played an important role in the quality of the beer brewed as demonstrated by the historical grouping of breweries in certain geographical areas, which became famous for their particular beer styles. With the availability of water treatment aids, it is no longer the case that the local water qualify dictate your style of brewing