I've had these problems introducing new peacocks into my tank...but...they always seem to work themselves out without death or severe injury. At worst, you get some damaged mouths from fighting until it settles down.
My advice is to make sure that there are plenty of hiding places for the bullied peacock. He'll go in and hide. Probably disappear for long periods. Any time he comes out, the dominant peacock will chase him about. BUT...eventually, a balance will be found, and the bullied peacock will emerge as he gains more confidence.
I have 4 male peacocks in my tank and 1 female. The top peacock has been 3 different fish. It's always settled with a minor fight. I mix dwarf mbuna and peacocks, and easily the most dominant fish in the tank are the peacocks. I guess it's down to size. I find keeping multiple males brings out their colour better, making them highly impressive additions to the tank.
My advice, stick with it, providing you have plenty of hiding places.
My advice is to make sure that there are plenty of hiding places for the bullied peacock. He'll go in and hide. Probably disappear for long periods. Any time he comes out, the dominant peacock will chase him about. BUT...eventually, a balance will be found, and the bullied peacock will emerge as he gains more confidence.
I have 4 male peacocks in my tank and 1 female. The top peacock has been 3 different fish. It's always settled with a minor fight. I mix dwarf mbuna and peacocks, and easily the most dominant fish in the tank are the peacocks. I guess it's down to size. I find keeping multiple males brings out their colour better, making them highly impressive additions to the tank.
My advice, stick with it, providing you have plenty of hiding places.