Force carb to 2.5 vol
Brew Day##########:
Kept at 153F mash consistently.
Mash pH 5.2
Post mash wort OG refractometer 1.057
10 minutes left wort pH 5.1
~2ml lactic added
Recheck pH 5, add 2ml more then hit pH 4.9
Takes ~2.5 minutes to drop 212 ->165
Whirlpool lasted about 15 minutes but only ~5 minutes of that was at 170F.
final wort pH 4.9, OG refractometer 1.065
For 50% brewhouse efficiency...
Fermentation######
Pitched around 74F. Fridge set to 66F.
Day 0: tilt temp remained 73F for the next day.
Day 1: Tilt temp reflecting fridge temp. Less than 1 day went from 1.064->1.019. Raised tempt to 72F. Opened dump valve to allow yeast to settle.
Day 4: hit final gravity 1.015
Day 7: s/p 3 days at final gravity, drop temp to 50 overnight
Day 8: Dump yeast and dry hop. Ended up adding 1.49 oz riwaka, 1.31oz Amarillo, 1.39oz mosaic.
Day 11: s/p 3 days dry hoping. Cold crash to 34F overnight.
Day 12: Pull sample for pH. Worth pH was 4.9.
Hypothetically: Dry hopping charge estimated raising pH by ~ 0.2. But Carbonating to 2.5 volumes will decrease pH by ~ 0.2-0.3. Already partially carbonated since fermenting under pressure and charged to 15 psi when cold crashing. Would assume its half way there so additional CO2 would drop pH ~0.1-0.15. So shooting for lactic addition to get to pH 4.6-4.7 for final pH once carbonated to 4.5. Estimated will need 3mL lactic acid.
But prior to this pH was actually 4.3 so no lactic was added.
Add ascorbic acid to keg 3/5th tsp
Purge Keg with CO2
Keg beer
Force carb to 2.5 volumes. Currently measuring tilt temp at 40F so 12.3psi needed.
Final beer: pH 4.3, FG 1.015, ABV 6.4. Kegged 9/13/25.
Evaluation:
Improvements for future: