I pitched Imperial A38 Juice into my black IPA on Monday. No activity until yesterday morning. Then nothing all day. When I got home from work, I noticed that there was a space between the krausen and the wort (bucket). I never seen this before. So I shook the bucket a bit last night and this morning and the blow off tube is full of foam. Now there is just an occasional gurgle according to my wife at home. Sorry for the long drawn out post but something just doesn't seem right. Any ideas?