I have another noob question. My first ever batch of brew is fermenting nicely. I have a nice thick layer of krausen foam at the top. My question is, when the fermenting is complete, will the foam all fall out and leave no layer, or will there still be a layer of foam? I guess i could just wait and find out, but the waiting is killing me. Anyhow, please let me know what to expect. Thanks in advance.