I built myself one of those handy dandy pink fermentor cooler boxes. I am still getting the hang of its thermostat (this is my 1st run in it). This morning I noticed that my temp had slipped down to 58. It had been a nice 62-64 (RIS - NB - calles for 62 for primary). I noticed that my blow of tube is showing considerable reduction in action since last night. Yes it has been since sunday it was brewed but I wonder if I may have put my lil workers to sleep. I have bumped up the thermostat but shout I swirl (there is still a nice 4 inch krausen on top) and reagitate or just let it sit??