I brewed a 6.5 gal batch of IPA. OG was 1.065. Two weeks later I racked (per recipe) to carboy. SG was 1.030 at 70 degrees, and there it remained for a week instead of steadily going to planned FG of 1.014. I chose to put the carboy on a heat mat to jumpstart the yeast (Safale US-05), and within 12 hrs, bubbles appeared on the surface of the wort and in the airlock. Temp was 80.
My earlier mistake was not getting enough O2 in the wort after cooling down to 70. It took nearly 4 days for fermentation to start, but then it went with a fury for a few days.
Question: Any problem leaving the carboy on the heat mat? Would the yeast keep working if it went back to ambient room temp of 68/70? Advice would be appreciated.
Grain bill for 4.5 gallons, 152º mash for 60 min:
13 lbs American Two-row Pale
2 American Munich (Light)
1 American Victory
.6 American Crystal 20L
.5 American Crystal 60L
.50 CaraPils
90 minute boil (hop schedule omitted from thread)
My earlier mistake was not getting enough O2 in the wort after cooling down to 70. It took nearly 4 days for fermentation to start, but then it went with a fury for a few days.
Question: Any problem leaving the carboy on the heat mat? Would the yeast keep working if it went back to ambient room temp of 68/70? Advice would be appreciated.
Grain bill for 4.5 gallons, 152º mash for 60 min:
13 lbs American Two-row Pale
2 American Munich (Light)
1 American Victory
.6 American Crystal 20L
.5 American Crystal 60L
.50 CaraPils
90 minute boil (hop schedule omitted from thread)