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Old 10-25-2009, 06:40 PM   #1
bushmanj
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Default cider gravity question

my cider has been fermenting for about 8 days. there has been a lot of constant airlock activity. i checked the gravity 4 days ago and it was 1.040 and again today and it was the same. again there has been loads of activity but no drop it gravity after 4 days. OG was 1.080

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Old 10-25-2009, 07:08 PM   #2
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Try shaking the sample for a minute to de-gas it.

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Old 10-26-2009, 12:04 AM   #3
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the co2 changes the gravity reading?

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Old 10-26-2009, 01:30 AM   #4
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Well yeah, the hydrometer is based on viscosity/density so any co2 in solution will essentially artificially lift the hydrometer, leading to a higher gravity reading then the truth.

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Old 10-26-2009, 02:15 AM   #5
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+1 on the CO2. I had a batch 'go up' in gravity after a week
Shook the thief, ton-o-bubbles later the reading was down...

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