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Something has gone awry
(lemmy.world)
This beer was fermenting normally for about 16 hours then foamed heavily. I guess its infected but I don't know how, usual strict precautions were taken. Outgassing like crazy.
Yeast does this if they are in really sweet spot for sugar, nitrogen, microelements, temperature, and pH. Almost always happens in braggot (once shot into ceiling with lock, was quite a mess), also if you add yeast fertilizer. I think I saw this reported reproducively for slightly over 23C lager yeast. And, well, insufficient headspace might be a problem. Don't worry, at least yet.
also happens with strawberry mead, for some reason