• Please visit and share your knowledge at our sister communities:
  • If you have not, please join our official Homebrewing Facebook Group!

    Homebrewing Facebook Group

Lost lid on yeast starter.

Homebrew Talk

Help Support Homebrew Talk:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Sounds like it is actively fermenting which means it's creating CO2. If it's still going I'm sure it's fine. I'd personally use it.
 
Unless you're preparing starters in a barn with livestock, I'd use it. I switched to open fermentation altogether and never had a sour beer yet.

Your starter is in a container with a 1" opening and it's actively out-gassing (pushing outwards). In addition, the Krausen itself provides a physical barrier. The Krausen usually has a high content of yeast cells acting as perimeter guards, which any intrusive bacteria must survive while penetrating through the barrier to reach your beer underneath.
 
Back
Top