Brewed a brown porter, think may have infection - Home Brew Forums

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Old 08-22-2012, 10:42 PM   #1
Mar 2012
Locust Grove, Georgia
Posts: 114
Liked 12 Times on 10 Posts

I brewed a porter, fermented for 10 days and transfered to secondary. I spilt off 1 gallon into a gallon glass carboy (brand new, rinsed with hot water 3 times and sprayed with starsan). Also added 7 teaspoons of raspberry extract from a new bottle. Six hours later, there is a white/yellow thick foam on the top. The other part of the batch in the 5 gal carboy looks fine. Any ideas if this is infected and can it happen that quick?

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Old 08-23-2012, 12:16 AM   #2
Nov 2011
Berwick, Nova Scotia
Posts: 280
Liked 41 Times on 36 Posts

Doesn't look infected to me, if there was sugar in the extract your fermentation could have started back up. Or fermentation wasn't quite done yet and the movement got the yeasties all excited.

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Old 08-23-2012, 11:27 AM   #3
Nov 2010
Solway, MN
Posts: 9,559
Liked 1682 Times on 1336 Posts

It looks like you have a head on your growler of beer. Not infected, just outgassing of CO2 from moving the beer causing bubbles.

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