I recently obtained a beautiful 18" female she us doing great. However my wife and I didnt want her to be the only shelled family member her entire life. We are considering an 18"-20" male. As far as introduction is there anything I should be aware of in terms of aggression and sleeping space etc? I was told getting 3 is better then having a pair. But as far as in door space thats not feasible at this time.. I've read that males get really testy during breeding season. When is breeding season for these awesome animals?