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Old 12-12-2006, 10:35 PM   #1
brmdavis
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Nov 2006
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I have a 6.5g bucket and a recipe for 5 gal. I decided to add some extra malt to bring it to 6 gallons (mistake) Anyway, a day later it had foamed up enough to clog the air lock and blow the top. I cleaned the lid and airlock and replaced it, noticing that the foaming had dropped to about 4 inches from the lid. I assumed that the violent initial fermentation was over since the foam was subsiding. After the lid was replaced for about 2 hours, i noticed discoloration in the airlock water and removed the lid. Sure enough, it had foamed back up to the top again. I set the lid back on without sealing it to avoid another small explosion.

My question is, why did it foam up a second time? I assumed it foamed up alot in the beginning b/c the yeast is all excided with the sugar and what not, but once the foam dropped, i assumed it was slowing down. Does it ferment in stages? Does the lid being off slow it down? What gives? I would assume that since it had a day to produce alcohol before being exposed to the open air, the chance of contamination is much less; is this the case??

 
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Old 12-13-2006, 02:42 AM   #2
2fat
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Jan 2005
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blow off tubes are your friend!
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Old 12-13-2006, 02:51 AM   #3
brmdavis
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Nov 2006
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not if the blow off tube gets clogged

 
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Old 12-13-2006, 02:57 AM   #4
david_42
 
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Oct 2005
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Actually, fermentation can run in stages as the yeast adapts to sugar complexity. A double blow-off is unusual.
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Old 12-13-2006, 03:00 AM   #5
sheephrdr
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Dec 2005
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possibly because the yeastys got more oxygen?

 
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Old 12-13-2006, 02:38 PM   #6
Ol' Grog
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Sep 2006
Chickasha, OK.
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I'd think that since you took the lid off, less back pressure and easily vented wort. When you put the lid back on, you sealed it up again. It was still brewing inside, you just didn't notice it as much.

 
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Old 12-14-2006, 03:43 PM   #7
brmdavis
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Nov 2006
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thanks guys, it seems to have settled down now, talk about a batch of brew with an attitude problem

 
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Old 12-15-2006, 02:18 AM   #8
Beer Weevel
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Sep 2006
Dinuba, CA
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I use a 1" blow off tube and i've never had a clogged tube yet?

 
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Old 12-15-2006, 07:36 AM   #9
mpbraman
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Dec 2006
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Done that in an apartment once. The wife never has forgiven me. Make sure that your overflow tube is in place but not pushed in too far. It needs to be only about 3/4 of the way into the stopper.

 
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