Gravity stuck at 1.030 during last two brews.

Discussion in 'Homebrewing' started by Tdins5, Feb 1, 2019.

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  1. Tdins5

    Tdins5 Initiate (0) Nov 23, 2018 New Hampshire

    Looking for a little help/insight. The I did two batches recently one of them my mash temps were off which is why my gravities were off.

    The other batch, I hit everything pretty spot on, but checked gravity on my refracto on day 12 and day 15 into fermentation and grabitu has been stuck at 1.030. Any thoughts?

    Grain bill below for this BIAB NEIPA style:

    3.75g boil
    2.5g fermenter volume

    Distilled water
    1 tsp calcium chloride
    1/2 tsl gypsum

    4lb UK pale 2 row
    12 oz flaked oats
    12 oz German wheat malt
    2.5 oz corn sugar (late addition)
    2.5 oz Canadian honey malt
    2.5 oz German acidulated malt
    2 oz rice hulls

    60 min mash at 154
    10 min mashout at 175
    60 min boil

    Wyeast London Ale III 1318 pitched at 69 degrees
     
  2. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    You need to use a refractometer calculator to adjust the readings.
     
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  3. hoptualBrew

    hoptualBrew Initiate (0) May 29, 2011 Florida

    Or use a hydrometer after alcohol has been produced.
    Refractometer is good for brew day. Hydrometer is best for cold side imo.
     
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  4. Tdins5

    Tdins5 Initiate (0) Nov 23, 2018 New Hampshire

    Fair point I did the brix calcs yesterday evening, not much as a concern but still need it to drop by a few pts. I suppose it still has a few days in the fermenter and hoping it will drop, if not clean up some more of the flavors.
     
  5. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    Just to be sure, what do you mean by "brix calcs?" Did you use a tool called a refractometer calculator (or something similar), i.e. one that takes in both your original and final refractometer reading, and uses them together to determine FG?
     
  6. Tdins5

    Tdins5 Initiate (0) Nov 23, 2018 New Hampshire

    Correct - refractometer calculator that takes both original and final readings to determine FG. The only piece that I still need to understand better is the Wort Correction Factor, which I believe, if I did it correctly came to 0.9984.

    I did distilled water calibrated at zero at 69 degrees. The wort gravity (1.060) before I pitched at 69 degrees and the reading from last night (day 15 in to fermentation) at 69 degrees (1.030).

    Basically what the calculator spit out was 1.060 OG Corrected (which hit my mark) and FG Corrected at 1.014 which I'd like to see it at 1.012. So not terribly off, but still a few more days in the fermenter.
     
  7. bakinnebrew

    bakinnebrew Initiate (0) Jan 5, 2015 Tennessee

    This is also industry standard. Using a refractometer during/post-fermentation will yield inaccurate results. It is designed to measure sugar concentration in the absence of alcohol. Make sure you use a hydrometer and de-gas your sample before taking a reading (the little carbonation in the green beer will inflate your reading).

    One more thing, that yeast strain is a high flocculating yeast, so it is easier for it to just poop out sooner than you'd like. It's not ideal, but you could revive it by giving the carboy a very gentle swirling to see if it will finish up. Also, it doesn't hurt to throw in some 05 yeast to finish the job, especially if you don't want to be drinking an overly-sweet beer.
     
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  8. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    Hmmm. I've taken gravity readings in several commercial breweries, and I'd say about half were using refractometers more often than hydrometers.
     
  9. hoptualBrew

    hoptualBrew Initiate (0) May 29, 2011 Florida

    Anecdotally my experience in 2 breweries has always been hydrometer cold side FWIW.

    + 1 to degas sample as well. I remember taking samples by vigorously pouring the sampled beer back and forth between flasks then leaving it sit out for about 30+ minutes before taking a gravity.
     
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  10. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    I'm not generally an advocate of throwing in additional yeast, unless something is really stuck. And in this case, I'd be even less inclined to do it, since OP is brewing a NEIPA. US-05 is not one of the fast flocculators known for getting out of the way and leaving dry hop oils in suspension.
     
  11. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    Using your recipe's specs, and depending on which "pale 2 row" malt is specified, BrewCipher predicts an FG of either 1.014 or 1.015. So I'd say you are probably there.
     
  12. bakinnebrew

    bakinnebrew Initiate (0) Jan 5, 2015 Tennessee

    Totally with you on this, Vikeman, but if I had the option between having an overly-sweet beer just because its not true to style to add 05 (or some other yeast) or having a drinkable product that wasn't what I was originally shooting for in the beginning (i.e., too dry, not enough hop oils, etc.), I'd pick the latter. As a homebrewer, drinkability is a high priority for me. It's also cheaper than dumping an overly-sweet beer where the fermentation is stuck.
     
  13. CShell1234

    CShell1234 Initiate (0) Oct 25, 2018 New York

    I never realized this was something that needed to be done but it makes sense! I will definitely be doing this in the future... I also made the mistake in my first 2 brews of adding water to top off the wort to 5 gallons and then taking an OG reading from the diluted top of the carboy :rolling_eyes:
     
  14. Bryan12345

    Bryan12345 Initiate (0) Mar 17, 2016 Texas

    I’m guessing that you have a bad reading. How does it taste? Obviously it won’t be amazing at this point, but is it crazy sweet? If not, then you’re on track, you just don’t have a means to calculate abv at the end.

    With the other batch, as you seem to be aware, temperature is everything. Gotta keep those enzymes happy at ~154 :slight_smile:

    Also, very minor, “g” stands for grams. Use “gal” for gallons mate :wink:

    RDWHAHB

    Bryan
     
  15. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    @Bryan12345, you might want to read the whole thread. Thr "problem" has been solved.
     
  16. Bryan12345

    Bryan12345 Initiate (0) Mar 17, 2016 Texas

    Ain’t nobody got time for that :slight_smile:
     
  17. honkey

    honkey Maven (1,350) Aug 28, 2010 Arizona
    Trader

    I use refractometers throughout fermentation for quick checks and to get a really close ballpark. Then for the final test before cold crashing, I use a certified calibrated hydrometer for production records. Those hydrometers are expensive, so I don't like to risk breaking them (I get clumsy when I'm trying to work quick) by using them too often.
     
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  18. pweis909

    pweis909 Grand Pooh-Bah (3,250) Aug 13, 2005 Wisconsin
    Pooh-Bah

    But they got time to type gal?

    :slight_smile:
     
  19. jbakajust1

    jbakajust1 Pooh-Bah (2,552) Aug 25, 2009 Oregon
    Pooh-Bah

    I used to calibrate with distilled, but honestly, haven't lately and never will again. I understand the concept of it but I think it is faulty to calibrate to distilled unless you are brewing with distilled. I calibrate to my brewing water only. The amount of sugar I am measuring is in relation to my water, not distilled.
     
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