stevescott123
Well-Known Member
I would say your at a disadvantage buying a big mouth because of the space at the top (at least as far as secondary fermenation goes).
With a regular carboy you have the narrow neck (which means less surface area in contact with your beer and less chance of oxidizing.) This is assuming that you fill your carboys to the neck.
For this reason I would only get a big mouth in 6.5 gallon carboy, since I would only use them for primary fermentation.
My 5 gallon carboy has never been filled to the neck so it's always had the same surface area as the Bubbler now has. I just bought a 6.5 gallon version to secondary NB's Plinian legacy which is formulated to yield a 6 gallon batch before loss to substantial hops. After that I'll be able to primary in it. And watching fermentation will beat anything on TV...