I did a quick search and found a few threads talking about this very thing but i found threads that said they use a 1.25" but mentioned that they were concerned about air getting in and then i saw one that mentioned they use a stopper and a 3/8ths " tube in it to the bucket.
I have a stopper with the hole for the air lock in it, can I safely use that with a 5 gal carboy with 5 gals of beer in it? I would imaging that regardless of the size, it would do what it is supposed to right?
Let me know if I am making a big mistake by doing it this way. I am going to brew my first batch tomorrow or this weekend.