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Old 04-08-2010, 01:24 AM   #1
Apr 2010
Summit Oregon
Posts: 7

im a newer/novice brewer. I am reading a lot about reusing your yeast "trub" which i think is really awesome but i have a question for the more experienced. I have heard that reusing a yeast culture from a beer that is above 6.5% ABV is not advised, I dont brew anything below that. Has anyone ever done what im thinking about doing without any adverse effects?? Any input is very appreciated. Thanks!

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Old 04-08-2010, 01:39 AM   #2
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ajf's Avatar
Oct 2005
Long Island
Posts: 4,646
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Yes, I've done it a few times. The experts say that it is not a good idea because the higher gravity stresses the yeast, but I didn't notice any problems.
Disclaimer. Just because I didn't notice any problems, doesn't mean that there weren't any. It just means exactly what I said, but I'm usually fairly good at noticing off flavors and fermentation problems.

P.S. The only times I've done it were when I was making another beer with an OG > 1.070

There are only 10 types of people in this world. Those that understand binary, and those that don't.

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Old 04-08-2010, 11:58 AM   #3
Nov 2009
Upstate NY
Posts: 329
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I thought that always referred to re-using the yeast cake (trub and yeast mixed together) directly. I figured if I washed the yeast and made a 1.040 starter with a few Tbsp of yeast, and stepped it up a time or two that the "stressed" yeast would have reproduced and created not-so-stressed yeast.

Anyone can correct me if I'm wrong, but I haven't had a problem with this yet. Maybe I'll salvage some of my stressed yeast from my 1.104 wee heavy when the time comes -- just to see.

Fermenting: A few beers

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Old 09-12-2010, 03:28 PM   #4
BeerBrent's Avatar
Nov 2007
Posts: 83
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i don't know about repitching yeast into a certain alcohol strength and the implications of that. but what i have heard is that it is better to repitch washed yeast from lower SG beers into higher SG beers.

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