So, this is the first time I’ve used US-04… I pitched on Monday, noonish, and left it in the garage. Fermentation was quite active by Tuesday morning. Then, the weather changed, and the temperature dropped a bit, with the beer temperature falling from about 66F to about 60-61F, but it seemed okay. When I checked on it Wednesday evening, the krausen had dropped and the visible signs of fermentation were gone.
I’ve since then brought it inside and used a carboy wrap to heat it up to 68-70F, swirled it gently a bit, and held it at 66-68 overnight.
Again, this is the first time I’ve used US-04. Is this rapid’ish fermentation behavior normal? Or did I cause it to stall due to the cold? If stalled, is it likely to resume fermentation, or should I expect to need to pitch fresh yeast?
Thanks & cheers.