Ok I have a 29 gal, I'd like to buy some african cichlids for it, now I like the lemon yellows. I've heard from others that they shouldn't kept in anything smaller than a 50 gallon tank, I guess due to 'em being territorial. I understand that. But there is something I don't understand, 5 could go in a 30. I just want a species tank, just lemon yellows? Is this doable? If not please tell me why,.