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Old 05-11-2012, 06:03 PM   #1
May 2011
san diego, CA
Posts: 84

This is the third time this has happened... Does anyone know what kind of infection I have here? I have to get to the bottom of what's causing this, this is 15 Gallons... That's A LOT of beer going to waste...

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Old 05-11-2012, 06:08 PM   #2
Apr 2009
Boise, ID
Posts: 1,608
Liked 38 Times on 33 Posts

Miss a pic there?
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Old 05-11-2012, 06:15 PM   #3
tripkings's Avatar
Aug 2011
Littleton, Co
Posts: 59
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Is that a view of the beer surface?

It looks like saran wrap on top and maybe the first pic I've seen that didn't look like normal beer in an "I have an infection thread".

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Old 05-11-2012, 06:35 PM   #4
Oct 2009
Pembroke, MA
Posts: 329
Liked 13 Times on 11 Posts

is this a cracked glass carboy?

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Old 05-11-2012, 07:05 PM   #5
Nov 2008
Orange County, California
Posts: 187
Liked 3 Times on 3 Posts

Looks fungal but would need a better picture.

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Old 05-11-2012, 07:14 PM   #6
Jun 2010
Posts: 930
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No wonder some people think that home brewers are cooking meth.

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Old 05-11-2012, 07:28 PM   #7
Sep 2010
Jacksonville, FL
Posts: 21

Ive had that infection before, usually during the warmer months while Im trying to brew lighter session beers. I actually quit brewing for about 6 months after 1 summer because for some reason it hit 3 batches in a row and I couldnt figure it out. I finally narrowed it down to my washed yeast samples.

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Old 05-11-2012, 07:28 PM   #8
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Zuljin's Avatar
Mar 2012
Posts: 26,433
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I don't know what kind it is, but that looks like a biofilm.

Biofilms form in liquid when some microorganisms manage to float on top of a liquid and reproduce and/or more microorganisms attach to them. It may or may not be one kind of microorganism.

If you've had this three times, and assuming you cleaned the crap out of everything really well, you may want to consider replacing any scratched or plastic gear (hoses, buckets, carboys, cups, spoons). Not that plastic is bad. Many of us use plastic with great success. It's just that plastic is more likely to harbor unwanted bugs than glass. If you get it again, replace the glassware too. After three times now, you're probably to the point where losing beer is costing more than replacing some gear.
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Old 05-11-2012, 08:02 PM   #9
Nyxator's Avatar
Sep 2007
Tempe, Arizona
Posts: 205
Liked 1 Times on 1 Posts

The streaking makes me think lacto. Here's a pellicle from the Pellicle Photo Collection thread. There aren't any bubbles, but it looks similar. I definitely wouldn't dump it. It'll probably make a decent sour beer in six months or so.


That being said, I think you're going to need to replace all plastic brewing equipment and do a deep cleaning of your glass.

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Old 05-12-2012, 06:09 AM   #10
May 2011
san diego, CA
Posts: 84

That's a picture from my conical.. Agree it looks similar to the pictures in that thread but no bubbles... What's weird is that all 3 times it has appeared AFTER fermentation has finished, this has been in the fermenter for 3 weeks and it wasn't there a week ago, temp was kept at 65 for the whole time... I'll see what it tastes like, if it's drinkable i'll give it away to certain people I don't like very much haha..

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