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Old 02-11-2013, 01:25 AM   #1
ylpaul2000
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Default Weird fermentation?

Ok, so I made 15 gallons of a russian imperial stout yesterday that I have done several time in the past. The beer is bubbling away just fine, but when I swirled the carboy today it erupted and blew the airlock off and went crazy all over the counter it was on. I tried the same thing with the other two carboys and got the same result. After about 5 minutes it settles down but when I swirled it another time the same thing happened.the OG was 1.115, any thoughts?

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Old 02-11-2013, 05:14 AM   #2
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Why are you swirling the carboys?
When you swirl them, also called rousing the yeast, you off gas a lot of CO2. In an actively fermenting beer that might cause an 'eruption' like you mention. Not the greatest thing to do until fermentation is stopped or near stopped, though.

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Old 02-11-2013, 12:59 PM   #3
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Quote:
Originally Posted by ylpaul2000 View Post
when I swirled the carboy today it erupted and blew the airlock off and went crazy all over the counter it was on. I tried the same thing with the other two carboys and got the same result.

...when I swirled it another time the same thing happened.
Slow learner?
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Old 02-11-2013, 09:14 PM   #4
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I've been brewing for nine years and have several hundred brew sessions under my belt. I've never seen this happen before! I just shook it a little and it literally blew the little cup out of the air lock and then blew the air lock, stopper and all, out of the carboy, it was extremely violent! I was just shocked is all.

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Old 02-12-2013, 03:01 AM   #5
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I've never seen that before but I can only imagine it is from the Co2 suspended in the beer. Ever shaken a beer before? Same thing!

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