Thanks for the concern. I give them some variety but I've been too dependant on flake food and got giving enough veggies. Partly because of the mess it leaves in the tank.
My sick fish is not doing quite as well as I thought. When I thought she was swimming, it turns out she was resting on the spray bar, which is about 1.5" from the surface. She frequently moves about, but spends most of her time resting on something. She does not seem interested in food. I also noticed this morning that her lower lip is starting to swell, which may be a secondary, opportunistic infection. If her lip starts turning white, I'll have to quarantine and medicate. Unfortunately, my quarrentine tank currently has some new arrivals that I'll have to place into a tank that shares water with my fry and display tanks.
I've been feeding mainly peas and fry food, but I'm concerned that my neon tetras might not get enough to eat; they don't touch the peas and reluctantly taking some fry food. This is another reason I should quarrantine.