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Old 10-13-2010, 12:34 PM   #1
Aug 2010
Posts: 120
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If I have a primary fermenter that has some significant head space, should I be concerned about taking the lid off and introducing oxygen when taking hydrometer readings?

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Old 10-13-2010, 12:37 PM   #2
Jan 2009
Pea Green, Colorado
Posts: 2,935
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No worries, co2 is heavier than air, just don't go whipping it up or anything and you'll be fine. Also, it's fruit fly season, so be carefull you don't trap one of those little nasties in there when you close it up again.
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