You shouldnt breed them. They should breed each other....LOL If you get males and females and the water conditions are right I think they will breed. I dont have experience with peacocks but my mbuna breed like crazy. I just am really anal about the water quality. But I have not removed the holding females from the tank so all the fry have gotten eaten. I would think you will have to have a grow out tank. I am sure others will probably have more info on the peacocks specifically.