Low OG Pre-Boil

Discussion in 'Beginners Brewing Forum' started by Hawkeye Brewing, Oct 14, 2018.

  1. Hawkeye Brewing

    Hawkeye Brewing New Member

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    So I am doing a ESB and currently have 7.1 gallons pre-boil volume with a target fermenter volume of 5.5 gallons. My target OG pre-boil was 1.061 and it came out at 1.038. Do I let it go or add DME?
     
  2. Hawkbox

    Hawkbox Well-Known Member

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    That sounds incredibly low. You may want to double check your readings.
     
  3. philjohnwilliams

    philjohnwilliams Well-Known Member

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    Yes, if you are 20+ points low then there is something very wrong. If this was an all grain batch, did you crush the grain yourself?
     
  4. J A

    J A Well-Known Member

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    That big a difference is usually a mistake somewhere in the fermentables. I had a custom fermentable entered wrong once and it was counting as not needing to be mashed. That meant that the calculator assumed it was 100% no matter what the efficiency said, made for a very, very low OG.
     
  5. Nosybear

    Nosybear Well-Known Member

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    Double check your gravity reading too.
     
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  6. zised

    zised New Member

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    #6 zised, Oct 16, 2018
    Last edited: Oct 16, 2018
    Make sure you are taking pre boil SG at room temp. If you are taking at mash temps you are looking at up to 10-20 points difference.

    If i need to bump SG i do so after the boil. you can always boil a small amount of water and corn sugar or DME and add it

    Assuming you had a recipe double check your efficiencies. Start low like 50% and then use the brew day to calculate actually efficiencies and then update your recipes as you improve.
     

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