I never leave anything in an open primary after the primary ferment is done ie when the SG stabilizes , no visible activity and no more protective layer of CO2 is being emitted. No point giving oxidation exposure.
That means never longer than 7 days in an open air primary. Into the protective carboy or gallon jugs at day 7 or sooner.
It's worked out is is always day 7 though some of them could have been day 6.
Then I can do the next process step(s) at my leisure it's in the carboy,it's protected.
Original recipe? What is the temp of your must?
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@dangerdave does yeast 'go bad' after being in the liquid DB must for so long without starting to ferment?
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