How to Know When Fermentation Has Finished

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Portrait of Emmet Leahy

Emmet Leahy is the Chief Operating Officer and lead product developer at Clawhammer Supply, a small scale distillation and brewing equipment company. He loves the process of developing new equipment for making beer at home just as much as he does using it to brew his own beer. He's also passionate about teaching people how to use distillation equipment to produce distilled water, essential oils, and with the proper permits, fuel alcohol and distilled spirits.

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96 Comments

  • A
    Comment Author: Abe

    Where I live the summer temperatures are also too hot for the turbo yeasts. some solutions are:
    - cool your wash right down to 18 degrees celsius before adding the yeast;
    - Put the fermentation bucket in another bucket with water- evaporation helps cooling down a little;
    - use distillers yeast that may generate less heat on its own.
    Overheating of the wash during fermentation will result in less of an alcohol yield, but the end result may still be impressive.
    I don’t know if it gets cold in your part of australia, but turbo yeast gives impressive results (up to 22%) when the fermentation bucket is kept really cold.

  • JW
    Comment Author: Jimmy Wilson

    I have had my mash working for a week with turbo yeast and its almost quit working and its kinda week can i still run it

  • J
    Comment Author: Jon

    I am new to this and may sound like a stupid question but here it goes.
    Can i add turbo yeast to my already fermenting mash ? If so should i add the 24 or 48 hr yeast. i didnt plan very well and going on vacation .
    As of today it has been 3 full days of fermentation .
    Please help !!!
    Thanks in advance

  • B
    Comment Author: Bill

    A quick question. At the end of fermentation do I need to siphon off the water or do I leave for the processing? I have a flat top still and the bottom is the fermentation pot. Any help will be appreciated.

  • MC
    Comment Author: MIke cHristensen

    Have my corn maize & sugar w/whiskey turbo yeast in 6.5 gal bucket,do I wait until all bubbling has stopped or is there a day limit (like 2 weeks)