New method:
1.1 Mash as usual. I mash at 65c for an hour and sparge with 80c water.
1.2 Primary: Use Lallemand Philly Sour for fermentation.
1.3. Secondary 4-8 weeks: Add cloudberries that has been frozen and then pasteurised at 70c, then chilled.
1.4. Keg, drink & Enjoy
Old method:
2.1. Mash as usual. I mash at 65c for an hour and sparge with 80c water.
2.2. Let wort temp drop to around 40 - 45c.
2.3. Use actic or phosphoric acid to reach pH 4.5
2.4. Put wort in a clean and sanitised corny keg. Add lactobacillus.
2.5. Blow out any oxygen - important!
2.6. Keep for a couple of days and check pH. If possible, maintain 40-45c.
2.7. When pH is down to 3.6 - Add 5 liter water to be boiled away and boil as usual.
2.8. Goal is still 19 liters to fermentation.
2.9. Primary fermentation 1 week: add yeast and ferment as normal.
2.10. Secondary fermentation 4-8 weeks: Add cloudberries that has been frozen and then pasteurised at 70c, then chilled.
More info and options about fast souring:
http://sourbeerblog.com/fast-souring-lactobacillus/