BostonJ
Well-Known Member
Should you use an airlock or not?
Yeast Starter Question
- Thread starter BostonJ
- Start date
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IMHO, no , you want free air exchange to promote healthy yeast growth. I just sanitize a piece of foil and place it loosely over the top of my flask. Some folks will use a foam stopper that allows the gasses to escape but nothing to get in but I've never had an issue with the foil.
homebrewdad
Well-Known Member
No, a piece of sanitized foil is fine.
You use an airlock with beer becaue you want to let CO2 pressure out, but no oxygen in. You actually want oxygen in your starter, because the point of the starter is the growth phase (which requires oxygen).
This is why people use stir plates and such with starters, but never with beer - the stir plate mixes more oxygen into solution, which promotes more yeast growth.
You use an airlock with beer becaue you want to let CO2 pressure out, but no oxygen in. You actually want oxygen in your starter, because the point of the starter is the growth phase (which requires oxygen).
This is why people use stir plates and such with starters, but never with beer - the stir plate mixes more oxygen into solution, which promotes more yeast growth.
