Dugin
Member
I propagated some yeast from a Chimay bottle the other day. This was my first time harvesting yeast from a commercial beer and also my first time working in any way with a Belgian yeast strain. The starter I created with it smelled great, funky and banana-like, so I brewed a small batch of a Tripel and pitched the starter. Now, after two days in the primary, they yeast is happily bubbling away but the smell coming out of the airlock is terrible. The banana is still there but is way overpowered by an extreme funky/sour smell. Did my batch get contaminated or is this how a Belgian yeast strain smells while it's working?