Author Topic: Stuck Fermentation..  (Read 295 times)

Offline SBaker

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Stuck Fermentation..
« on: January 13, 2020, 01:56:59 PM »
I came home from a two week holiday to find my Imperial Stout with a stuck fermentation.
My OG was 1.090 and now after 5 weeks in the primary it reads 1.040!
I used 2 packets of Safale US 05 and stirred with a drill mixer for good aeration. The fermentation took off within 6 hours. I had the fermenter in a fermentation cooler with temps set at 65f to 68F for 18 days.
Fermentation was still active so I did not transfer it to the secondary before I left on holiday. I attributed this to the fact that it is a high gravity beer  - original grain bill = 24.5 pounds.
Upon my return there was no noticeable action, I checked the gravity and with a hygrometer it read 1.040! * checked with my refractometer, after calculations, it was about the same.
Here is what I think happened:
We had set the home ac/heat to 60f, which is lower than the average temperature range for this yeast. The house could of dripped lower than 60f in the room where I do my fermentation.
Lowering the temperature to 60f stopped the fermentation.
Here is what I've done:
I raised the temperature around the fermentation bucket. ( using a spot light, door open on the fermentation cooler ). The bubbling started up again as the temp of the air approached 70f.
It's been 2 full days since it started bubbling again and is still working.
At this point should I worry about any off flavors from not transferring the beer off the fallout and trub? It tastes good, btw.. but I don't want a small stout.

Offline BOB357

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Re: Stuck Fermentation..
« Reply #1 on: January 13, 2020, 03:04:24 PM »
Most home brewers don't even use secondary unless it's a beer they want to bulk age for more than 6 weeks or so. Most of the flavor is developed in the first few days of fermentation, so I really don't see a problem. I'm sure you're going to want to age this for at least a couple of months. Just wait until fermentation finishes up and then transfer to secondary. You've already done what you can, so RDWHAHB!
Bob

Offline SBaker

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Re: Stuck Fermentation..
« Reply #2 on: January 13, 2020, 03:06:51 PM »
Thanks Bob,
It never hurts to have a second opinion.