This is my first attempt, and I'm brewing a dry stout. I'm doing primary fermentation in bucket covered only by a towel. I'm planning on moving it to a carboy once the primary fermentation is done. Only thing is, I'm having trouble telling when it is done. It's been fermenting for about 5 days, and it looks like its going well. I'm gonna need to move it fast since theres no airlock on it. So, what should I look for to know when its done?