I figure I should join this post since I do love them tetras. I got a tank with several Neons and few Glow-lights, some Lemons and a pair of silver hatchet and a group of Panda corys.
I know I should've bought more hatchet but I have this pair for almost 2 years and I'm almost positive that thay are indeed a PAIR from the way they interact. So I don't want to mess it up by adding more. Although they do recommend to have a group like 6 of them. Anyway, beside tank is pretty well stocked anyway.
Neons and Glow-lights school together sometime. I have mix of regular and albino, well Neon is partial albino and sold as gold or white neon. As much as I like Lemon but they can be greedy pig try to eat all the food. They even try to swallow 1" long earthworm I chop up for my corys. Half sticking out of their mouth and the other Lemon try to chase the one with worm.

It is kind of funny but I'm thinking about replacing them with smaller prettier tetra I saw at the store recently. I saw 2 small tetras(one was called white star tetra and the other called ember tetra) and I liked their colors.
Beside I bred every fish in the tank except hatchet fish and I might want to try to breed another small tetras. Also, I got this 2 for 1 coupon at the store selling those small tetra. They are smaller than Neon. I can only use 1 coupon per day so I might have to go 3 times and get 6 for price of 3.
Anyway, beside all these tetras. I might get some gold tetra or pristine tetra if I have bigger tank. Some reason, I don't care much about the Cardinals tetras. I prefer the Neons over Cardinals. Then, their price really dropped within last year or so. I may try some someday. And maybe add some pencil fish. I like my hatchet fish. And I finally got some WINGLESS fruits fly culture for them. And feel much better for them now. They eat flakes and other food but I was worried that they don't get any live food especially some insect. Since I know that is their natural food. So I was happy to find the WINGLESS and not flightless fruits fly culture at the local aquarium society auction. I or my neighboors don't want any flying insect buzzing around. Flys or mosquitos. So now I got this insect hop and jump but not flying. And hatchet suppose to love them but they either learn to move quicker than Lemon or I may have to move Lemon. They are super quick greedy little Pirahna. That is another reason I'm thinking replacing Lemon.
Anyway, I wish I have space to put bigger tank. Then, I'll make the tank out of the fish I mentioned. And make South American Amazon biotope tank. Maybe I'll add some Diamond tetra which is one of the bigger tetra I like. And maybe get a pair of Ram and try to breed them also. Although I read that cory might annoy Ram, especially when they are in breeding condition. But bigger tank there maybe enough space for both.
Heck, if I have more space I'll get some group of Angels and grow them to breeding pair. And may even save up enough money for all the gudgets and fish for Discus. But for now, I got this peaceful tetra/cory/hatchet tank. And smaller tetra/panda cory conditioning tank turned into panda's breeding tank. And lots of small container and air-tubes everywhere hatching and raising all them panda eggs and frys. I still need to improve the way I raise them since I don't think I'm getting enough fish growing up considering the number of eggs I'm getting every weeks. Almost all of them hatch and feed and grow to 2 weeks or so. And I lose lots of the fry around 3~4 weeks. Right now I grow them with sand substrate but I am considering getting rid of the sand and make it to bare tank. Anyway, I should post this in cory section.