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Old 07-01-2009, 10:50 PM   #1
Apr 2007
Posts: 56

quick question that i'm probably missing the "jist" of.

let's say i'm brewing an imperial stout and have a bunch of dry yeast packets laying around.

and, it's an extract w/ steeping grains recipe.

it's a winter warmer type brew i'm shooting for that will age from now until the holidays.

focusing only on dry yeast, would rehydrating more packets than normal (let's say 4) increase the amount of fermentation vs using 2 packs?

just curious, gator

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Old 07-01-2009, 10:54 PM   #2
Apr 2008
New Jersey
Posts: 1,097
Liked 38 Times on 34 Posts

Check out this
Mr Malty Pitching Rate Calculator
put in your OG and volume of wort and it will
tell you how many dry yeast packets you need.

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Old 07-01-2009, 10:57 PM   #3
Ale's What Cures You!
Yooper's Avatar
Jun 2006
UP of Michigan, Winter Texan
Posts: 69,885
Liked 8090 Times on 5646 Posts

Increase the fermentation? Not really. But, you should always pitch the correct amount of yeast for each batch. What I mean is this- the yeast (even one package) will ferment the sugars available. But, if it's a high OG wort, or a hot (or cold) temperature ferment, etc, the yeast can become stressed and that is a big cause of off-flavors in beer. Not only off-flavors, but stuck fermentations and a higher FG can result from underpitching the yeast. There is also a risk of overpitching, believe it or not. Most homebrewers can't really overpitch, but it is possibly especially in breweries.

By pitching the proper amount of yeast, whether it's one, two, six packages, you are ensuring good yeast health.

To find out the proper pitch rate, check out this link: Mr Malty Pitching Rate Calculator
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Old 07-01-2009, 11:31 PM   #4
Apr 2007
Posts: 56

EXACTLY what i needed.

thanks, gator

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