yeast - MFG date 6/16/19. Yeast starter on 8/14 @ 1.4L and 8/17 @ 3L for ~549B cells Salt additions : Mash : Gypsum 9.2 Calc Carbonate 1.9 Epsom 3.8 Boil : Gypsum 12.1 Calc Carbonate 2.5 Epsom 5.0 Previous brew session pH levels water pH 6.98 1ml = 6.66 2.5 ml = 6.28 1ml = 6.05 .6ml = 5.7 Inconsistent mash temps caused low OG.
Based on boiling 13.90 gallonsliters at 1.055 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.059. You wanted an OG of 1.068. It looks like it will be under.