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Old 03-22-2011, 01:51 AM   #1
NoisufnoC
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Default How long does Wyeast Activator yeast stay good?

I've got a pack of Wyeast Activator liquid yeast with a date of 9/13/10 in the back of my fridge. It has puffed up a bit, but not as big as they usually do when you smack them. I was planning on using it for a brew day on Saturday, but the Mr. Malty calculator says that its only 10% viable. My planned brew is going to have an OG of 1070.

Should I...

A. Throw it out and buy new yeast.

B. Make my starter as planned, try the old yeast, and hope for the best.

C. Make a starter with new yeast, and double pitch the starter and the old yeast.

D. None of the above.

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Old 03-22-2011, 02:35 AM   #2
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Make a starter and give it a couple of extra days. I might do a step starter where you keep adding in extra starter solution every day. It will help the yeast stay in reproduction as opposed to fermentation.

But if you got the pack to inflate a normal starter will probably work.

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Old 03-22-2011, 02:35 AM   #3
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The pack actually inflated on its own :-\

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Old 03-22-2011, 02:51 AM   #4
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Option 3, you will be fine. If you have a few minutes to spare I would do as flyhigh suggested and make a small first step starter with around 250mL, once that reaches krausen pitch it into the size of starter you calculator says.

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Old 03-22-2011, 02:54 AM   #5
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If I was planning on brewing on Saturday, then when should i start the small starter?

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Old 03-22-2011, 03:01 AM   #6
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Go ahead and start the starter tomorrow (or tonight if you've got the inclination!). Give it to Wednesday to grow up a little bit, toss it in the fridge, decant it on Thursday and add more wort, toss it back in the fridge on Friday, and decant again on Saturday for pitching!

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Old 03-22-2011, 04:38 AM   #7
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started the starter tonight, i'll see how it goes by wednesday. Worst case I'll swing by my LHBS and buy some new yeast.

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Old 03-23-2011, 12:56 AM   #8
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the starter is going well. i came home from work today and swirled it a few times, and that was all it took to blow the airlock and stopper right off.

I started with about a 1L starter, I'm going to refrigerate it tomorrow morning, decant, and pitch into another ~1L starter. Or should I go bigger?

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Old 03-26-2011, 06:53 AM   #9
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so far so good. the yeast seems really happy with the starter.



that was just after a couple swirls

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Old 03-26-2011, 06:57 AM   #10
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Quote:
Originally Posted by NoisufnoC View Post
so far so good. the yeast seems really happy with the new wort.


that was just after a couple swirls
Diggity, I think those boys are ready.
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