Allright, dumb questions. I have a red in my secondary using up my airlock. I never even gave it any thought, and thus started to brew up a batch of wheat for the primary. Problem is, I should have ordered a 2nd airlock, because I only have the one.
Can I use plastic wrap and a rubber band on the secondary (carboy) and steal that airlock for my primary, or is there a better short term answer?