Re: EUREKA!! I HAVE NITRITES!!!!!
You may want to rethink the neons. Many people think of them as a newbie fish, but I have read that because the way they are farmed, they are very stressed when the arrive at the pet store. They are raised (in the east) with lots of antibiotics and hormones - not the best conditions. Something to consider. I also heard that they are very particular about water conditions - but I would go look that up to be sure.
Best bet - for those colors - go with the cardinal tetras. They have more red on their bellies, so they are even more colorful than the neons. I'm not sure about the way these are raised, but it's probably pretty similar.
The krib has a good article on what's a good starter fish, what's a good intermediate fish, and so forth. The thing I like about that article is that they explain why they think they are easy, medium or difficult fish to keep. Myself, I like to hear the reason behind someone's opinion.
Anyway - good work!