.What do you guys use for primary fermentation Carboy or Bucket? Can you use either and leave it in primary and not rack to secondary? I have a 6.5 bucket and a 5g carboy. I was thinking about starting to do some 2.5g batch's and buying two 3g carboys to use for primary.
I have everything from plastic water jugs, to buckets to 1 glass carboy to several Betterbottles of all sizes, and even my old mr beer keg, and I have month long primaried in all of them. Again it really doesn't matter, there is NO limitations to who can long primary. This doesn't require any thought about doing, there's nothing special you need to do or use.
You all are just over thinking it or discussing it; There's really no questions that need to be asked, or answered, just be like Nike;

Most of us who have been doing it for years just did it by accident. We couldn't get to our beer for whatever reason for a month (I was out of town from the point where I would have normally racked to secondary, for two weeks.) And I just went ahead and bottled when I got back. And the beer turned out better than previous batches. So I started doing it.
And I submitted a bunch of beers in a contest. There were 2 that were secondaried and 2 that were long primaried, and the LP ones got higher scores and better comments about clarity and crispness that the ones I secondaried. So that was enough to realize there was something to this....and I never looked back. And my scores have consistantly been better than any I ever submitted before. All from just leaving my beer in primary for a month.