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Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Over a year old wyeast
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Old 08-20-2013, 10:28 PM   #1
bcmeyer
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Default Over a year old wyeast

So I work at a homebrew store, and I can take home any yeast that goes over their expiration period (6 months for ales yeast and 5 for lager yeast). I picked up a Wyeast 2278 Czech Pils so that I could redo a Pilsner a have made previously. When I first looked at the date I thought it said February 28, 2013, but it actually was February 28, 2012. I was already going to make a starter with it, but now with it being over a year old it has me worried.

Anyone have a recommendation for this? It's always been kept refrigerated so I'm sure there are still yeast in there. How low of a starter should I start this out at?


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Old 08-20-2013, 10:41 PM   #2
BanginBanjo
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Well according to MrMalty, it's about 1% viable. I would recommend starting with a fresh pack in this case.


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Old 08-20-2013, 11:04 PM   #3
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Make a starter, you'll know if it's viable or not. I've used some old smack-packs with good results.
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Old 08-20-2013, 11:21 PM   #4
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I would start with a 250 ml starter of 1.020 wort. Then step up. Yeastcalc.com might give the information on the size of the rest of the steps.
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Old 08-21-2013, 03:15 PM   #5
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I grabbed a two year old pack of lueven pale for $1 earlier in the summer. A couple of steps in a starter and I was good to go.
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Old 08-21-2013, 04:35 PM   #6
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I made a saison with a nearly 2 year old smack pack of 3711. 500ml starter stepped up to 2L. Worked like a charm.


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