When I solely fed fermented, I used Scratch & Peck grower. But any feed works, really.
I used large glass jars with the lids just kind of set on top. I'd screw them on when I shook them up and loosen them again afterwards.
I've also read that you need to let yep water set for a say or so before using it to allow dissipation of any chlorine that messes with the fermentation process.
My birds LOVE it, but it is time consuming. I only feed it 2-3x per week now. I feed it to them on pie plates. I only give them what they will eat right away because you don't want it to get moldy. They eat pellet free choice the remainder of the day.