OK. So it sounds like I have three options:
1. Smaller container.
2. Marbles
3. Gas
1. is expensive but will work. I would need to buy food grade gas-impermeable 3 gallon containers. A cost of roughly $60 and then I've got to store them someplace when I'm done.
2. totally...
Long time brewer, first time wine maker...
I've been reading many threads here about headspace and it seems to be universally accepted that minimizing the surface area in the carboy is best/easiest. My issue is that I plan on fermenting with two different kinds of yeast to have a taste off...