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

  • SD
    Comment Author: Swamp Daddy

    My mash is bubbling but my airlock is not haven’t opened bucket its been fermenting for 4 days now I used instant yeast so should it be ready this fast

  • B
    Comment Author: Brian

    What’s the deal with all these questions and no answers? What’s the point in asking?

  • G
    Comment Author: Gutbucket

    If my mash doesn’t start to work after adding the yeast by 48 hours can I add more yeast?
    This is my first try at making shine.
    Thanks Gutbucket

  • M
    Comment Author: Mike

    What happens if you add the yeast too early to a warm mash is it still any good I’m making a pineapple run

  • A
    Comment Author: al

    just started my first i guess it would be a mash tonight. juiced 25 or 30 pounds of apples and 1 small bag of baby carrots made about a gallon of juice. added 5 1/2 gallons water 12 pounds of sugar disolved the sugar let cool to 77 degrees f added lemon juice and yeast. amazing 30 minutes after i covered my 9.6 gallon pot the airlock started to bubble about every 8 to 10 seconds i am hoping that is a good omen.