OldSole
Active Member
I am worried about oxidation with all the extra headspace (?).
Not an issue for primary fermentation due to CO2 production. Don't even worry about secondary. Just primary for 3-4 wks then bottle/keg. I use 5 gal carboys as primaries for all of my 3 gal batches.
Dunno if you plan on bottling or kegging, but I use 3 gallon kegs for the small batches. If you have 5 gallon kegs, you can purge them to minimize the amount of O2 in the headspace.