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Author Topic: What gravity is primary fermintaion done?  (Read 1204 times)

Offline jkmarvin

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What gravity is primary fermintaion done?
« on: December 03, 2011, 05:36:52 pm »
Hi all
What gravity is primary fermintaion done?  Doing a old ale (1.078-1.08) and was wondering what the usual gravity reading is when primary is done.  I know that the krausen should wane but was looking for something more specific.  I have the Brew Balls so I don't have to mess with a thief and what not.

Thanks, Cheers.

"I got the BALLS Baby!"
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Offline bonjour

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Re: What gravity is primary fermintaion done?
« Reply #1 on: December 03, 2011, 05:47:50 pm »
It is done when the gravity doesn't change for several days.

Assume 75% attenuation and with a 1.080 OG that would be 1.020.  Do NOT take this as golden, there are many, many factors that affect attenuation that could throw this number off.  Always use the first criteria


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Fred Bonjour
Co-Chair Mashing in Michigan 2014 AHA Conference in Grand Rapids, Michigan
AHA Governing Committee; AHA Conference, Club Support & Web Subcommittees



Everything under 1.100 is a 'session' beer ;)

Offline jkmarvin

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Re: What gravity is primary fermintaion done?
« Reply #2 on: December 03, 2011, 05:56:24 pm »
So transfer the beer to secondary vessel after 75% attenuation.  That much huh?
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Offline bonjour

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Re: What gravity is primary fermintaion done?
« Reply #3 on: December 03, 2011, 06:00:21 pm »
That's not what I said,

To decide to secondary at all I'd need to know the details of what you are brewing.  What I said was that fermentation is complete when the gravity stops changing.

Most beers do not require a secondary.
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Fred Bonjour
Co-Chair Mashing in Michigan 2014 AHA Conference in Grand Rapids, Michigan
AHA Governing Committee; AHA Conference, Club Support & Web Subcommittees



Everything under 1.100 is a 'session' beer ;)
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