How to Know when Fermentation Has Finished - Advanced (outdated)

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Outdated. Click here to read our updated article on advanced fermentation monitoring.
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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22 Comments

  • M
    Comment Author: Moe

    Do you sell the Patriot built.i can’t do that. Talk to me about the so called wash.very confused. Does the fermentation happen with the grain or without. Do you reuse some of the grain or not.once again confused.

  • K
    Comment Author: Ken

    What if…..the SG is at 1.000 but it’s still bubbling?

  • AH
    Comment Author: andrew hammer

    I just realized i added twice as much yeast as needed. how bad is this? can it be saved?

  • BT
    Comment Author: ben takash

    How long can my mash sit after fermentation? Also my mash was really thick before I added my yeast. Is that normal. I’m new to the process and any info is greatly appriciated.

  • G
    Comment Author: GAMPsMixology

    Hi, I have a sugar and molases mash of 16.2Lts added some turbo yeast on friday (exactly 72hrs ago) it started fermenting about 63hrs ago.

    Is there anything I can do to stop fermentation?
    the rate of the bubbles seems to be going down but airlock still bubbling about once every 5 seconds.

    Any help?

    Thx