Stalled porter

Discussion in 'General Brewing Discussions' started by SoccerBrewer, Dec 13, 2017.

  1. SoccerBrewer

    SoccerBrewer New Member

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    I have read several posts on stuck fermentation, but didn't see a real relative story, so.....All grain Porter, recipe estimated OG at 1.063 at 50% efficiency, OG was actually 1.070 (I use a quality refractometer). Pitched 2 packs of Wyeast 1028 London ale yeast (last minute brew day decision--no time for a starter) that were very fresh (packaged 7 days prior to pitching) at 68 degrees,(the temp of my basement). Saw first signs of fermentation within a few hours, then fermentation went absolutely bonkers for the next 2 days, then it all came to a crashing halt.....hmmm....ok...checked gravity, 1.035....swirled....checked again a couple days later, now 1.034....swirled again and every few days....now 3 weeks after pitching and still 1.034.....So.......Toss in a high krausen starter? try raising the temp? Thoughts?? Brewers Friend recipe calculator estimates a final gravity of 1.014......quite a ways to go still.....
     
  2. Trialben

    Trialben Well-Known Member

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    Seems like yoyve done everything right. It sure wont budge. Next thing id do is raise temp by degree or two.

    Would a small feed of simple sugar help i wonder just to get the yeast going again?
     
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  3. CRUNK

    CRUNK Well-Known Member

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    Ditt
    Ditto, if that doesn't restart it, then try to rack it to another fermentor and pitch fresh yeast.
     
  4. ACBEV

    ACBEV Active Member

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    ^^^ Ditto Ditto...

    Question... How are you measuring gravity? With your refractometer? or with a hydrometer?

    I'm hinting at an anomaly in your measurment.
     
  5. Nosybear

    Nosybear Well-Known Member

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    I, too, tend toward measurement error as your problem. That looks like about what a refractometer would read for that beer, once it had fermented.
     
  6. SoccerBrewer

    SoccerBrewer New Member

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    #6 SoccerBrewer, Dec 17, 2017
    Last edited: Dec 17, 2017
    Ahhh.....OK, new refractometer user......I wasn't correcting for the alcohol content....OK...OG was 18 Brix /1.070 (1.072 corrected), final gravity currently is 9 brix /1.035 (1.015 corrected), which is about 7.92 ABV considering my wort correction factor of 1.03....if my calculations are correct.... That makes much more sense.....I have to tell you though if that is correct that yeast was supercharged doing the lions share of fermenting in 2 days time from pitching! I've never had one that fast before!
     
  7. Benman IPA

    Benman IPA Member

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    having a similar issue with a porter, OG 1.070 and FG 1.033 last time i checked (two days ago)
    please explain the alcohol content correction - why you convert 1.035 to 1.015?
     
  8. Ozarks Mountain Brew

    Staff Member

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    just measure with a hydrometer and you wont get confused
     
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  9. Benman IPA

    Benman IPA Member

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    my hydrometer reading was 1.033, i think i will move to another fermentor and pitch fresh yeast tomorrow
     
  10. Ozarks Mountain Brew

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    you have to pitch yeast that will handle the alcohol, also if its high flocculating it can get trapped and go to sleep
     
  11. Benman IPA

    Benman IPA Member

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    i used Windsor with this batch, what dry hope do you think will work?
     
  12. Benman IPA

    Benman IPA Member

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    dry yeast of course - with a lot of hope...
     
  13. SoccerBrewer

    SoccerBrewer New Member

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    My issue was I was using a refractometer, not a hydrometer. With a refractometer for anything other than OG you have to convert the Brix reading to gravity (Brewers Friend has a calculator). My refractometer was reading 1.034 or about 9 Brix, which when converted taking into account the alcohol content, the equivalent FG is about 1.015. With a hydrometer there is no conversion. Make sense? With yours being a hydrometer reading, if it has been sitting there for more than a couple weeks with no change, then it would be time to do something more.
     
  14. Ozarks Mountain Brew

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    Windsor demonstrates moderate attenuation that will leave a relatively high gravity
     
  15. Benman IPA

    Benman IPA Member

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    FG should be 1.015 (7.4%ABV) according to Brewer's friend , i thought Windsor should be a good choice
     
  16. Ozarks Mountain Brew

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    Ive never had much luck with Windsor
     
  17. Benman IPA

    Benman IPA Member

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    do you think S04 will work for the recovery?
     
  18. Ozarks Mountain Brew

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    it wouldn't hurt, i like it better
     
  19. Benman IPA

    Benman IPA Member

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  20. Benman IPA

    Benman IPA Member

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    ill do S04 ans hope to reach the target, thanks for your help!
     

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