I finally got around to making some brew last night. Everything went great except for the most important part. I can't, or it doesn't seem to be fermenting. I re-hydrated the yeast, which was Nottingham's, at 86 F water while I was chilling the wort. There was a bunch of activity so I knew the yeast was good to go. But, I over chilled the wort and all my make up water was refrigerated because I had assumed that chilling the wort would take forever. Anyway, so I then used a gallon of distilled nursery water and some tap water to make it to the 5 gallon mark. I pitched the yeast and shook it all up. At first, it was fermenting, according to the bubbler. Then, about 6 hours later, it hasn't done squat. I cleaned my thermometer and popped off the lid to check the temp, thought and it "felt" like it was cold, but it wasn't. Temperature was in the high 60's. There was some krauzen on top, just a little, but nothing super foamy looking. I did stir the thermometer around in the wort some and then when I closed the lid, it started fermenting according to the bubbler, then it just quit again. What's the deal? Did I not aerate it enough or am I being too paranoid, 8 hours may not be enough to crank up the yeast? If the water was too cold, did I kill off the yeast? What are my options...