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Old 09-07-2011, 08:42 PM   #1
Gtrman13
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Default Mold on outside of fermenter

So I have a small predicament on my hands here. I have a brew in primary that I had in a water bath and wrapped in a wet towel to keep the temps down. For the first few days I had a fan blowing on it to keep the air circulating. I had to go out of town for a few days and I didn't want the fan running while I was away so I turned it off. Now that I'm home, I've discovered a small amount of mold growing on the outside of the bucket near the lid. I'm sure the beer in the bucket is fine, but I don't want any mold spores contaminating it when I transfer it out. Any suggestions on how I should proceed? I washed the outside as well as I could with star san but I just don't feel too confident that was enough to kill the problem. Thoughts, anyone?

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Old 09-07-2011, 08:47 PM   #2
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Personally I wouldn't be too concerned with mold on the outside. After all, you don't sanitize the outside of your fermenter, do you (I don't)!

I am guessing some bacteria in the air found the nice moist towel a good place to breed. A very different environment compared to the inside of the fermenter which will be sanitized and have big bad yeasties guarding your beer from any other baddies.

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Old 09-08-2011, 12:57 AM   #3
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Ive had an issue with mold around my airlock plug,just try not to move it around to much but maybe wipe the outside off with a sanitizer.
Why dont you try rotating 20 oz frozen water bottles in the bath while keeping a thermometer in it? Instead of a wet towel.
Next time you brew be there at least the first week during fermentation to control temps until you find a permanent solution like a used fridge with a $70 thermostat controller. If you plan on brewing often and have temp control problems you may want to look into this. Im pretty lucky i have areas in my house where i can keep between 60-70 year round.

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Old 09-08-2011, 01:26 AM   #4
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Wipe it off with a bleachy cloth or paper towel. Spray StarSan around the neck and stopper area before you rack it and you'll be fine.

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Old 09-08-2011, 10:12 AM   #5
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I wouldn't worry, recently I had mold growing in my airlock, however the beer was totally fine.

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Old 09-08-2011, 10:25 AM   #6
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It happens, nothing to worry about.

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Old 09-08-2011, 02:15 PM   #7
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Happens all of the time. That's why we call it a swamp cooler.
Just use your spray bottle of starsan and squirt it down good before opening.

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