Have you had any issues with them? This is my first tank other than a betta. I've only got them in the tank right now, as I'm stocked as much as I'd like to be. Anything I should watch out for with them? Behavior, diet, health? Thank you very much for your response!
They're pretty much bulletproof. A normal community flake/pellet works fine for them. Black worms or blood worms as the occasional treat is always fun to watch. They fight pretty often to establish and reestablish their hierarchy. Overall they're a really fun fish.
EDIT: They're color also depends on how dark your substrate is. They'll be light green/blue with lighter substrate and dark green/black with dark substrate.