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Old 01-01-2013, 12:47 AM   #21
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He edited the first post
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Old 01-01-2013, 12:56 AM   #22
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Um, aren't you "re-hydrating" when you pitch the dry yeast onto the wet wort?

Rick
Yes, and the high gravity sugars burst the cell walls killing the yeast. It ferments much better when it's alive!
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Old 01-01-2013, 03:07 AM   #23
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Thanks for the replies! I will try hydrating my yeast for my next batch and see how my beer turns out.

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Old 01-01-2013, 04:35 PM   #24
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.....Wow, appears fementis has changed the US-05 PDF, never had any hydrating options before, What the hell do I know...... (you do not have to answer that)....
Interesting. I've only been brewing a year, but every packet of dry yeast I've used (Danstar Nottingham, US-05, S-04, Lalvin 71b-1122) has suggested rehydration as the first option, with sprinkling as an alternative. The data sheets all give pretty detailed instructions on the rehydration procedures.

I had no idea they didn't used to recommend this.
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Old 01-01-2013, 04:55 PM   #25
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Why does the temperature have to be so high to hydrate the yeast? And what is the difference between rehydrating and making a starter with DME?

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Old 01-01-2013, 05:01 PM   #26
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Just to clarify: Danstar recommends rehydrating @ 80*F (+\- 6*) not 110*F

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Old 01-01-2013, 05:05 PM   #27
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Interesting. I've only been brewing a year, but every packet of dry yeast I've used (Danstar Nottingham, US-05, S-04, Lalvin 71b-1122) has suggested rehydration as the first option, with sprinkling as an alternative. The data sheets all give pretty detailed instructions on the rehydration procedures.

I had no idea they didn't used to recommend this.
On the yeast package itself?

I'm holding two packets of Fermentis yeast, one of Safale s-04, and one of Saflager s-23. Neither say anything about re-hydration, both say to "sprinkle into wort".



Rick
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Old 01-01-2013, 05:13 PM   #28
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On the yeast package itself?

I'm holding two packets of Fermentis yeast, one of Safale s-04, and one of Saflager s-23. Neither say anything about re-hydration, both say to "sprinkle into wort".



Rick
Sorry, you're right. It's on the PDF instruction sheets for those.
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Old 01-01-2013, 05:15 PM   #29
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Sorry, you're right. It's on the PDF instruction sheets for those.
Gottcha.

I think after reading everything in this thread that I'll personally start re-hydrating my dry yeasts. If it's a better practice I'm all for it.

Rick
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Old 01-01-2013, 05:24 PM   #30
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I think after reading everything in this thread that I'll personally start re-hydrating my dry yeasts. If it's a better practice I'm all for it.

Rick
I like to do it simply because I primary in Better Bottles, and it's a lot easier to pour a measuring cup of slurry in than to sprinkle a packet of yeast in through the small opening.
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