Mash at 153°F for 90 minutes. Add 10ml Lactic Acid to bring to 4.9-5.1ph. Chill to 110°F, and pitch your Lacto culture (3 Goodbelly Mixed Berry Shots).. Kettle sour to the desired perceivable acidity level (Around 3.6ph - check at 16hr) Add 1.5lbs of frozen then thawed raspberries after 4 days of Primary. Ferment for 14 days total.