black neon, neon and glowlight in my 120cm. So all relatively small tetra species. Black hang out slightly higher up
EDIT: The black and glowlight are similar-ish and so I find it interesting when one looks a little closer and see the different colouration. Neons are 8 dropped from 40 after a period of neon tetra disease, which I could do nothing about although the remaining are clear. I do like the classic look of neons and the pop of a big group in a planted tank but I switched to the other species after this (candinals are a little bigger so didnt go for them)