I've recently started fermenting in converted pony kegs (7.75 gallon SS kegs, aka - slim quarter kegs). When I mentioned this at my LHBS (MoreBeer - Riverside, CA) I was told that doing this could cause fermentation problems. I have fermented about 4 beers using these vessels and haven't noticed anything wrong. Just curious, does anyone out there know what kind of problems would come from using a slim quarter keg as a fermentation vessel?
Cheers,
Darin