i have bben to only one small brewery and i asked them this very question. he said that they have some yeasts that they will harvest but no more than 2-3 times. after that there is risk of mutation. he said that they did have one or two yeasts which were given to them in germany which they pay a lab to cultivate.
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Primary-
Lagering-
Primary-
secondary-
secondary-
on tap- lemongrass kolsch
on tap- stout
on tap- small mead
bottle-sweet mead
bottle-
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