Well I brewed this last night, my efficiency was absolutely horrible...(60ish) but tasted really good going into glass. I put my blowoff tube on and this morning I had great crust all through my line but the the bubbling had slowed considerably by noon so I replaced the blowoff with an airlock. it was bubbling at about 1 per 5 seconds through the airlock, should be good right? well I checked in on it a couple of hours later and its bubbling like crazy again!! high Krausen and rising. Wierd... will keep an eye on it, may have to go back to the tube.