There are several reasons why a sugar wash would ferment slow or stall... They are temperature, pH, and nutrients - in that order... Optimal temperature range for most yeasts is a steady 75F - 85F... Most yeast will go dormant as early as the low 70's...PTS_35 wrote:Gravity only at 1.030 from 1.040 a week ago?! Any one have any suggestions? Started this on 3/17 at 1.070. Wonder what the heck is taking so long
If pH drops below 3.8 - 4 you'll start seeing problems... Adding oyster shells into you wash can help because the shells won't dissolve if pH is in the normal range but will dissolve and adjust pH if the wash goes acidic...
If the wash lacks adequate nutrients the yeast colony might slow, go dormant, or resort to autolysis (cannibalism)...