just a comment about mixing aeneus variants as they will spawn together and get undesired mixes of fry. especially with the ease that aeneus spawn at, even in community tanks. I would not reccomend keeping different aeneus varients together in the case that spawning does occur.
i would suggest if infact you do find aeneus black or green lasers that you either get a new tank for them or part with the common aeneus variant you have right now.
or even better, maybe get a different species to mix in with your current aeneus as there are so many other options to choose from.