So I have a ten gallon divided two times for 3 fish. I have Koi on one end. He is still not eating -_- and I am putting Sakura in the middle, and will eventually put another male in the end. (Going to see if I can convince my sister to give up blinky if I buy her a pink fish...I think she will go for it haha) so I am thinking having Sakura in the middle with field off some aggression that may have arisen if I put a strange male and Koi next to each other. But being the fact that Koi still isn't eating should I wait to put Sakura in the tank? Sakura is in perfect health and is very active so I think she will really enjoy having more space to explore. But I am worried it may stress Koi out even more. So should I wait for him to settle in more, or would it be okay to add Sakura in? Your suggestions are greatly appreciated.
I would also like to point out I do know the risks of housing males and females in close proximity, and will be very careful. And I also know the female can and more then likely will become very eggy.