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Subject: headspace when lagering
Author: spargebag
Aug 1st, 2016
12:29 am
So I'm getting ready to lager the aforementioned bw that I got all the bubbles from racking all the loose dry hops. I wasted 3 QTS in the process so now have 4.25gal in a 5 gal carboy. After the racking fiasco I added a cup of sugar to restart fermentation and hopefully use up any o2 I may have introduced. There was airlock activity several days and Inever removed the stopper. Am I safe to just move the carboy to the fridge w airlock on or should I rack to a 3 and 1 gal carboys?
Subject: Re: headspace when lagering
Author: paulb
Aug 1st, 2016
9:57 am
Take a gravity reading, any reason to split the batch?
Subject: Re: headspace when lagering
Author: spargebag
Aug 1st, 2016
11:16 am
To eliminate headspace and avoid oxidation
Subject: Re: headspace when lagering
Author: Burp
Aug 1st, 2016
2:02 pm
CO2 is heavier than air so it will fill the headspace.

"Carbon dioxide has one carbon atom and two oxygen atoms,
and a molecular weight of 44 grams per mole ( a certain number
of molecules). The oxygen in the air is actually O2, or molecular
oxygen, with a molecular weight of 32. Hence, carbon dioxide has
a higher density, or is heavier than oxygen."
Subject: Re: headspace when lagering
Author: DConn
Aug 1st, 2016
3:25 pm
But if you look at Henry's Law, there will still be some gas mixing.
Subject: Re: headspace when lagering
Author: Burp
Aug 1st, 2016
3:55 pm
He could always fill the head space from the CO2 tank then add an airlock.
Subject: Re: headspace when lagering
Author: Longshot
Aug 1st, 2016
6:55 pm
It seems to me that there would be greater risk of oxidation by racking to two new carboys versus leaving the beer in the current carboy with some extra headspace. I also tend to be lazy about racking and only do it when absolutely necessary (full disclosure). Filling the headspace with some CO2 from a tank, as Burp suggested, seems like a good move.
Subject: Re: headspace when lagering
Author: spargebag
Aug 1st, 2016
8:07 pm
Don't have a tank but have device that fills bike tires w co2 using 16g cartridges. I purged w that n moved to fridge...thanks y'all.

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