salt additions : Mash : Gypsum 9.2 Calc Carbonate 1.9 Epsom 3.8 Boil : Gypsum 12.1 Calc Carbonate 2.5 Epsom 5.0 water pH 6.98 1ml = 6.66 2.5 ml = 6.28 1ml = 6.05 .6ml = 5.7
Based on boiling 13.90 gallonsliters at 1.061 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.065. You wanted an OG of 1.068. It looks like it will be under.