I have had an Electric Yellow Chiclid in my tank for about a month now. The cycle has had time to finish and Ive done water changes regularly. So today I decided to add two more of the electric yellows. I got one male and one female. The problem is now that the female I had in the tank is bigger and now that I added these two they seem to hide up in the corner away from the female. The male looked okay at first, but now he is darkening and I dont know what is going on?