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Home Brew Forums > Home Brewing Beer > General Techniques > Diacetyl
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Old 05-23-2007, 12:28 AM   #1
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Default Diacetyl

Still working on my first attempt at a lager. Four weeks at 50 degrees using Wyeast 2124 Bohemian Lager Yeast. I pulled it out yesterday and moved it to the secondary. Problem is that although it had no more activity at 50 degrees, when I moved it to 58 degrees for the 24 hour diacetyl it started fermenting again. So much so, that for a bit I thought I might need a blow off (secondary was filled pretty high.) Anyway, by tonight it had settled down and I moved it back to the frig at 40 degrees.

Question, is this activity common during diacetyl? Or did I just stir it up too much during racking?

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Old 05-23-2007, 12:42 AM   #2
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It is more common to do the diacetyl rest while still on the primary yeast.

I would say you stirred it up racking, enough to bring out some CO2 still in suspension.

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Old 05-23-2007, 12:48 AM   #3
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The directions weren't real clear on that. Will getting it wrong have any effect on the beer?

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Old 05-23-2007, 12:50 AM   #4
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Chances are that a 4 week primary would have taken care of any perceived diacetyl. BTW not all lager yeasts produce a lot of diacetyl that you would need a rest for anyway.

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