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Old 12-17-2012, 08:32 PM   #1
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Default last minute fermentation re-start

I am a beginner. I have only brewed 7 times. I am brewing a Sierra Nevada Pale Ale extract clone. My OG was supposed to be 1.051 but it ended up being 1.044. My final gravity is supposed to be around 1.013. I am using White Labs WLP007. I made a starter using a stir plate. The brew fermented strong for 5 days and it mellowed out until fermentation "completed" by day 7, or so I thought. I am at day 15 and had just finished cleaning up all my bottles when I heard the familiar bubbling up sound. I could not believe my ears. Fermentation started up again! It is bubbling 15 seconds apart. I took a gravity reading and it is giving me 1.006. I have not opened it since it started fermenting. I really don't understand what is going on here. The beer tasted really nice too. I put my bottles away and will wait it out but what can be the reason for this? any experiences with a similar situation?

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Old 12-17-2012, 08:34 PM   #2
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Give it another couple days and take another reading. It has probably stopped and what you are getting is off-gassing. It's basically just going flat.


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Old 12-17-2012, 11:17 PM   #3
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Very well could be co2 gassing off.

Have you taken any readings since the one mentioned?

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Old 12-18-2012, 03:09 AM   #4
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I took the first reading of 1.006 today at 2:30pm, it is now 10:00pm and still bubbling about once every 15 seconds. I will take another reading in the afternoon tomorrow. I want to avoid bottle bombs at all cost. If it is co2 gassing off then it should be ok. Only the hydrometer will know for sure. Is tomorrow too soon?
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Old 12-18-2012, 11:59 AM   #5
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Because it has been in the fermented do so long, if it is dropping, it is dropping slowly. You'll want at least two days between readings.

See this for more information:
http://woodlandbrew.blogspot.com/201...ermenting.html
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Old 12-18-2012, 12:40 PM   #6
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Has the temperature changed, a weather front gone through, the fermenter been moved or bumped? Any of those things can make the airlock bubble without any fermentation taking place. Only your hydrometer reading can be relied on for a determination of fermentation being done.
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Old 12-18-2012, 03:55 PM   #7
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No temp changes and no movement before I got to wondering and moved the fermenter to take a gravity reading. I was counting my Mississippi's too slow yesterday. It's more like 25 seconds apart. But it has been constant now for 18 hours. I guess I will know tomorrow after a second reading if its co2 degassing or real fermentation. I really was hoping to bottle this weekend but you can't hurry a living process I guess.
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Old 12-18-2012, 04:43 PM   #8
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Quote:
Originally Posted by ding_brew View Post
moved the fermenter to take a gravity reading.
In that case I'm 99% sure that's all that caused the bubbles. unless your fermentation temperature was less than 60 and the gravity was over 1.080 I bet it's done.
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Old 12-18-2012, 05:43 PM   #9
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I moved it after it had been bubbling for a few hours so I could check on the gravity to see what was going on.
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Old 12-18-2012, 05:47 PM   #10
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I'm hoping its done too but I don't want to risk any bombs. I am surprised no one has run into this before.


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