When they were younger and developing their colors, I had to take one of the males out and put him in a seperate tank....he was obviously the low male on the totem pole and his colors weren't showing as they should. The separate tank did wonders, and once he fully developed I put him back in the main tank. One lives on the left the other lives on the right and Mr. lowly stays in the middle. I should have quite a few of these fish up for trade in a month or so....along with a few others.