You could still have 7 neons, they are pretty small little guys! I have 6 kuhli loaches (4 striped, 2 black) in my 29 gallon tank with 10 rasbora espei, 1 male betta, 2 otos, snails and shrimp. I change 30% of my water weekly but it's hardly dirty.
As for feeding, I feed a variety of flake and frozen food (bloodworms, daphnia, mysis shrimp and brine shrimp) as well as shrimp pellets, bottom feeder tabs and algae wafers. They don't seem as into the fresh zucchini as my zebra loaches but they do eat an occasional snail.
Good luck with your tank, sounds like a nice set up!
As for feeding, I feed a variety of flake and frozen food (bloodworms, daphnia, mysis shrimp and brine shrimp) as well as shrimp pellets, bottom feeder tabs and algae wafers. They don't seem as into the fresh zucchini as my zebra loaches but they do eat an occasional snail.
Good luck with your tank, sounds like a nice set up!
I also have a planted tank...I guess I COULD go with 7 neons but I want enough room to have a few platy babies 
