They are doing fine all together. We just had one pass away due what we can only assume was due to moving away from the heat to drink and not being able to get back fast enough to warm up when we had very cold weather. She was very young but our older female seemed to have been depressed since her passing. Since we have had to put all 3 in one tank, she has been slightly more active, but has also been by one of our males sides constantly. The fatso has been left alone. We actually found him in the water dish soaking a little while ago. Should that spark concern in my case of him regurgitating? And per us getting paid again we will be getting a tank to atleast separate them for feeding. But I am not sure if my female would be happy if we separated them completely.