As far as their disposition, they should be fine in a heavily planted 10. The snag is that they will cross breed, and the fry will take on the appearance of one species or the other, but will be completely sterile. So please do not sell any of the fry. This can also be trouble because of the relatively short life span of these species, you have to keep breeding them to keep the tank going, and you wont know which fry to cull and which to breed. I see your from Pittsburgh as well, did you pick up the killies at Oddball, or is there another source of killies around town?
My witness is the empty sky - Jack Kerouac