Hi! I have 3 black skirt tetras, 1 white skirt, 1 serpae tetra, and 1 silver-tip tetra...and only the 3 black skirts swim together. They all get along well, except for the silver-tip (we named him Meanie) who chases everyone...but they don't school with the black skirts. When I get the ich under control, and I get my second tank set up/cycled I want to get each kind matching mates to school with...maybe Meanie will behave when he gets some more silver-tips to swim with.
What about buying fish online? I'm new, so I don't know anything about that yet... others here at Fishlore would be able to help most likely...
Good luck and nice posting to you!
Denise