I prepared the starter yesterday for tomorrow’s brew, keeping it on the stir plate with the smaller, banded spinner for around 24 hours. When I switched it off it rapidly went for good Krausen, but this evening it seems to have receded and looks almost lifeless. Too long on the stir plate / too far in advance of the brew? Will prepare just 24 hours ahead next time. Didn’t use the fermentation chamber either this time around, instead keeping it in the cool bathroom at around 19℃.
Brew Day Update
I was planning to pitch my remaining packet of dried yeast instead of this apparently lifeless starter, but there’s still the tiniest signs of fermentation from the layer of yeast at the bottom, so I’ll throw it in anyway and will follow up with dried yeast if nothing happens after 24 hours.
#wisdom: let’s keep starter time to 24 hours ahead of brew, with half of that on the stir plate.