Same batch, 2 different fermentations

Discussion in 'General Brewing Discussions' started by sn00ky, Sep 5, 2017.

  1. sn00ky

    sn00ky Active Member

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    Hey everyone,
    In the picture, take note of the 2 back carboys. One is clearly differentthan the other in terms of fermentation process. Both were same boil, same US-05 pitched from same starter (divided). Temperature difference over each side was less than a degree ( cold air source is on right ).
    I'm not yet concerned at all, letting them hang out for another couple days before FG and crashing, but ever so curious as to why a difference?
    Yeast was well stirred and I am fairly confident the pitch was equal between both carboys.

    Perhaps one had more trub from BK? Even if it did, shouldn't matter much.

    No big deal probably, more an observation 2017-09-05 14.57.36.jpg worth discussing.
     
  2. Ozarks Mountain Brew

    Staff Member

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    its normal, Ive had yeast go crazy with one batch and and using the same yeast trub from that batch lag a day and a half with the other beer, all kinds of things go on like replication and dormant cells its hard to tell
     
  3. CRUNK

    CRUNK Well-Known Member

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    Definitely worth the science behind this, learning only makes better beer. Do some research.
     
  4. Nosybear

    Nosybear Well-Known Member

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    And check with the hydrometer/refractometer to see if there is really a difference in fermentation, or just appearance.
     
  5. J A

    J A Well-Known Member

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    I'd say you're on the right track there...it'd be hard to drain a boil pot into two different carboys without getting more of the break material into one than the other. The other factor would be aeration. There could easily be a big difference in suspended O2 between the two carboys...even if you use oxygen in equal amounts, there could have been more to start with in one of them.
     

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