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Old 01-25-2014, 03:18 PM   #21
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From info gathered from different sources, the SAFALE US-05 strain (all I've used so far in two batches) actually is said to be more effective sprinkled dry and not rehydrated. Obviously I have little experience to draw from but the Wheat Beer that came with my Starter Kit turned out pretty good. Have a Chinook IPA that's still in primary but the verdict is still out. My plan was to brew the same Chinook IPA with liquid yeast and compare. Great thread here though as it gives us noobs some good advice. I know I personally tend to err on the side of caution since I'm simply trying to get the process down and comfortable with the times/temps needed to brew a successful batch. Cheers.

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Old 01-25-2014, 07:50 PM   #22
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From info gathered from different sources, the SAFALE US-05 strain (all I've used so far in two batches) actually is said to be more effective sprinkled dry and not rehydrated.
What are your sources? Anecdotal forum/LHBS chatter, or scientific studies?
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Old 01-25-2014, 08:02 PM   #23
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From info gathered from different sources, the SAFALE US-05 strain (all I've used so far in two batches) actually is said to be more effective sprinkled dry and not rehydrated. Obviously I have little experience to draw from but the Wheat Beer that came with my Starter Kit turned out pretty good. Have a Chinook IPA that's still in primary but the verdict is still out. My plan was to brew the same Chinook IPA with liquid yeast and compare. Great thread here though as it gives us noobs some good advice. I know I personally tend to err on the side of caution since I'm simply trying to get the process down and comfortable with the times/temps needed to brew a successful batch. Cheers.
If you look at Sean Terrill's experiments with US-05 linked in the first post, he showed pretty clearly that viability is substantially higher when rehydrated in warm water. More viable cells ferment more effectively than fewer viable cells as far as I can tell (except in cases of extreme overpitching) but if you care to share your sources I would be happy to read.
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Old 01-28-2014, 02:17 PM   #24
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Its been quite a while since I used US-05 but it seems to me the last time I did the package instructions simply called for a direct dry pitch into the wort. A visit to their website gives that as an option, but also provides very precise rehydrating instructions:

http://www.fermentis.com/wp-content/uploads/2012/02/SFA_US05.pdf

Cheddarhead may have simply been reading and trying to follow the instructions on the package.

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Old 01-28-2014, 04:38 PM   #25
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the package instructions simply called for a direct dry pitch into the wort. A visit to their website gives that as an option, but also provides very precise rehydrating instructions
rehydrating is the way to go.

they offer the hassle-free, "just pitch directly into the wort" instructions because they think homebrewers won't use their products if they instruct them to go through the (only slightly) complex process of rehydration. if you look at the commercial literature, yeast manufacturers say that dry yeast *must* be rehydrated. according to Jamil, up to half the cells don't survive being rehydrated in wort. on a homebrew scale that isn't too bad, but on a commercial scale you don't want to waste half of your raw materials. the mrmalty.com pitch rate calculator assumes that dry yeast is rehydrated. double the amount if you're pitching directly.
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Old 01-30-2014, 01:02 AM   #26
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Definitely not scientific as I'm new to the "art" of brewing. Following the guide lines on the package, calling customer service at Northern Brewer and just general articles I can find. Like I had mentioned though, I'm still in the experimentation phase and am going to try the same brew 2-3 different ways (dry, rehydrated, liquid) so I can taste the difference (if there is one) for myself. Cheers.

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Old 01-30-2014, 01:24 AM   #27
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rehydrating is the way to go.

they offer the hassle-free, "just pitch directly into the wort" instructions because they think homebrewers won't use their products if they instruct them to go through the (only slightly) complex process of rehydration.
I totally agree that, based on everything I've read to date, rehydrating the yeast is the best procedure. I'm not so sure I accept your analysis of Safale Labs' motivations.
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Old 01-30-2014, 03:59 AM   #28
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While none of us can claim to know what Fermentis' intentions are for certain, we can probably agree they want to make their product as attractive as the liquid alternative. Liquid yeast packs say to pitch without a starter, so you end up pitching 75-100 billion cells most times. Fermentis packs say to sprinkle on wort, resulting in roughly the same amount of live cells. They are at least consistent in giving advice that will work but may not be the most ideal on the packaging.

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Old 01-30-2014, 04:38 AM   #29
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Well if I've learned one thing from this thread is that I've got ALOT to learn. Cheers and thanks for all of the advice.

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Old 02-01-2014, 03:49 PM   #30
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Using Go-Ferm or equivalent products during the rehydration step is a great way to go. I use US-05 a lot and have observed significantly lower lag times when using Go-Ferm.

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