I have a male & female Festae at about 6" in a 360 gallon community tank. I am thinking about moving them to a 180 gallon tank, just the two of them, would a 180 gallon be to small of a tank when they reach adult size? There is no mating activity going on between them, but I am thinking that is because they are in a community tank. The Female dominates the Male, not to kill just a push every now and then... Neither of them have any fins or anything missing, they get alone ok... Although I am not sure if that will change in the 180 gallon. Do I need a bigger tank to house the two Festae in?