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Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Blow-off tube + evaporation = oxidization???
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Old 01-09-2013, 02:59 PM   #1
Delaney
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Default Blow-off tube + evaporation = oxidization???

Hi,

I'm currently fermenting two batches of mead, which are in the primary with blowoff tubes. I was away from the house for a month. I did not anticipate the evaporation of water from the jars acting as my airlock, and came home to find the tubes hanging in air (the tips were no longer submerged).


I know that CO2 is heavier than O2, but I'm concerned that due to air circulation, oxygen may have entered the tubes and displaced CO2 from the headspace in my demijohns. I will rack and top-up the mead ASAP as a precaution, just wondering what the likelihood of this having occured is...

Thanks for the input,

Delaney

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Old 01-09-2013, 04:16 PM   #2
shanecb
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There could have been SOME O2 that made it's way up to tube and into the demijohns, but the amount would be so low I wouldn't remotely worry about it. I'm sure I've introduced more O2 than that to batches of beer by pulling the lids of buckets off for tests and I've never had a single issue.

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