I have a bunch of rummy nose tetras in with my Discus. They stay fairly close to each other and are only about 1-1/4" long.
I'm sure you could sustain 5+ of them in a 10 gallon.
Once your up and stable I'd get a bunch of shrimp to liven up the sand bed.
Fish can easily got days without food. People tend to over feed far too much.
I wouldn't even worry about an auto feeder on it since it is such a small tank.
I'd want to take a break and feed them anyways.
