I brewed an AG DIPA on Sunday and last night our power went out at 3 a.m. and has yet to come back on. When I woke up at 10 a.m. the carboy temp was 52 deg. Being as im only into primary 3 or 4 days is the beer ruined.
No, but I'd guess the yeast has gone pretty dormant. I'd wrap it in some towels or a comforter. Once you bring it back up to temp, the yeast will pick up where they left off. RDWHAHB
If you can, bring it inside wherever you are living in the house. If you have a fire built, I'd put it near there for a bit to warm it up a bit (or warm the towels/blankets up before wrapping). Hopefully the power comes back on for you!
I was fermenting it inside my apartment and the power has finally come back on. The beer looks dormant, no krausen or anything. It has changed colors to an unusual green tint
It's probably fine. Most likely just looks off colored. As long as you didn't open it, there's no reason it could get infected or "ruined". Once you bring it up to temp and let it sit there a few days report back. If it still hasn't started back, I'd test the gravity and then possibly pitch more yeast.
Bring it inside... sit down and have a beer... and wait a few days it should pick back up....
if not then i would first use a sanitize spoon to gently rouse the yeast or gently shake the carboy... wait a few days... it that dosent work then pitch more yeast
Just to be safe, I would swirl the fermenter a few times as the beer is warming up. Since the yeast have dropped out due to falling temperature, swirling may also help to get them going.
I have had my fermenter with ale yeast at 55 fahr for a week now, beer samples and gravity are improving and airlock activity is back after a litte rousing. Very slough though. Don`t think you have to worry.