Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Bad lot of Safale US-05
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Old 10-26-2011, 12:20 AM   #1
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Default Bad lot of Safale US-05

My last few fermentations with US05 have been off. They've had long lag times, and slow ferments. I know this yeast very well, and I've probably fermented 20+ batches with it, so I know this isn't quite normal. My brew process hasn't changed, and I've had typical quick ferments with WLP007 in a recent brew. I just brewed a 1.070 IPA last night, properly rehydrated 1.5 packs of 05, and we're at 20hrs with no signs of fermentation. Just like my last 3 packs of 05, I'm sure it will take off in the next 12hrs or so, and slowly ferment out, I'm not worried but something is off. Ive double checked my fermentation chamber temp probe, it's fine.

Oddly enough, my attenuation is fine, but the yeast is slow to floc. These are all signs of poor yeast health. Anyone else having any issues with US05 lately? My packs expire 05/13.


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Old 10-26-2011, 12:36 AM   #2
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Yes, last two fermentations have been extremely slow and taken a few more weeks to fall out. Beer has been fine, but I have noticed a difference.


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Old 10-26-2011, 12:40 AM   #3
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I'm still pitching my old packets. Haven't noticed any issues with lag time or flocculation on those.
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Old 10-26-2011, 12:40 AM   #4
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I hate to say it, but this might get me to switch back to liquid yeast and washing.
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Old 10-26-2011, 12:53 AM   #5
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Just bought a packet on Sat...Do you guys have the lot number? At least what I think is the lot number is the number above the exp date...
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Old 10-26-2011, 01:29 AM   #6
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Where are you getting it?

How was it stored?

I have used US-05 a lot and have never had problems. It is a great yeast. That is what leads me to believe that it may be improper storage before you got it.
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Old 10-26-2011, 01:43 AM   #7
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I just used a pack of US-05 on a batch of pumpkin ale on the 21st that I got from northern brewer and it started up just fine within a few hours. No starter or hydration either. Today is the 25th and it's just started slowing down.
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Old 10-26-2011, 01:47 AM   #8
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I wonder if that is why it hasn't been available lately.

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Old 10-26-2011, 01:51 AM   #9
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This discussion won't go anywhere until you post expiration date. The OP is questioning packs expiring 5/13 not what you see with whatever batch you last used. If you use 05 check the date then post.
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Old 10-26-2011, 01:58 AM   #10
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No, I bought like 6 packs at the same time, all from the same lot, I still have two left. I checked them before I pitched 2 last night. Packs say 71322 124 1659 expires 05/13.

Now for all I know these could have been handled poorly -- they all came from the same shop at the same time. I started this thread to see if anyone else had the same issue(I forgot the ? Mark in the thread title)

There is no need for panic, me beers taste fine, this isn't like the notty issue last year. Its just annoying when what normally is a four day ferment takes fourteen.


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