I have two fermenters going with about a cup of slurry of S-04. Pitched Sunday morning at 61 degrees ambient, they were showing activity within 5 hours, vigorous activity within 12 hours. Went to harvest yeast yesterday, and the krausen had already dropped! I increase the chamber temp controller to 64 degrees, and decided to take a hydrometer sample, and it was about 1.029, down from 1.062.
I know airlock activity doesn't necessarily mean fermentation activity, patience is key, etc., however for the benefit of others, is there a rule of thumb for percentage of fermentation that occurs after the krausen has subsided? Could it be that this just premanturely flocculated on me? I have heard that S-04 can do this at lower temps.