Schooling Fish?

I just added 4 black nean tetras to my tank. They seem a bit bigger than the regular neons, and are schooling very well. I like that they are more "natural colored" yet have a bright iridescent stripe. I plan to increase my school size in the near future.
 
other good cichlids for those conditions

Are Rams, Apistogrammas (sp?) and members of the krib family pelvicachromis (sp?). I have Rams in my tank now (with african and south american tetras), but I have some wild kribs waiting in a quarantine tank to swap out with them. I bought a pair of pelvicachromis t. moliwe (pretty and uncommon like the regular kribs) and another one that the fish store says is wouri but doesn't look like the pictures on the net. (They say their fish source is very reliable and that they said it was p.t. wouri). They have the same shape as a pelvichromis but have a lot of blue in their gillplates (even when stressed). I also had a hard time seeing any different in sexes from the fish they had in the tank. I ended up picking the least agressive fish with a spot on it's dorsal and one without (Hardly any markings on the fins, the moliwe is loaded with markings) :confused:. Hopefully I have a boy and girl, especially at $20 a fish! I've seen them displaying to each other and then one fish gets a rosy cast to the belly (kinda a flash, doesn't stay) so I hope I lucked out. They had one fish that was keeping all others at bay and I assume that was a dominant male, but I got a smaller similar one. The quarantine tank has some young endlers and they are still all there so looks like they are going to be OK community wise :)
 
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