"Biofilm" on beer - uh oh - infection? - Home Brew Forums
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Old 04-05-2012, 10:53 PM   #1
Dec 2011
Cambridge, Massachusetts
Posts: 16
Liked 1 Times on 1 Posts

N00b here.

So I just pulled the lid off a chocolate stout (w/ lactose) that's been sitting in the primary for five weeks. Here's what I found:


Needless to say, I'm a little bummed out. This filmy stuff has a bit of a "broken glass" look to it - touch it and lightly-colored striations appear on its surface.

Does anyone know what this is? It looks like an infection to my n00b eyes, but it doesn't have any sort of funky smell to it.

The flavor of the beer, meanwhile, has gone significantly downhill since I checked it three weeks ago - the whole flavor profile of the beer just seems "muted" now in a way that's really quite inferior to how it was. I thought beers got better with more ferm time usually...

Anyways, does this look like an infection to y'all?

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Old 04-05-2012, 11:16 PM   #2
Oct 2009
Ludlow, Ma
Posts: 614
Liked 32 Times on 28 Posts

Looks infected to me...

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