Hi, first of all, I'm sorry, if this topic appeared on this forum already, but I haven't found anyhing. So my irish stout all grain brewing went very well and I'm sure I did everything correctly. After I pitched the US-04 the fermentation started as usual and in 2 days it went from 1043 (as planned) to 1031, but now it's nearly a week and the gravity is still 1031. The temperature is always around 21 degrees. Do you have any idea, what the problem is? Thank you very much for every helpful reply.