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How long to wait after adding S02 to kill native yeast?

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Siwash

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So I am "cleaning the slate" today to my crsuhed grapes. After adding the S02, how long should I wait before adding yeast and yeast nutrients? I went through my MoreWine manual but boy is info deeply buried in that document...

Thanks!
 

DanWine

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I usually go a couple hours after adding the SO2 and never had any issues. Depends how much SO2 you're adding though and what kind of yeast your using. I usually only add roughly 50 ppm SO2 give or take a little depending on what the grapes look like coming in.

Probably a safer bet to wait 12 to 24 hours. I'm just never patient enough to wait this long.
 

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