aggresive percs

I have a 55 gallon tank and had three chromis in it until Saturday when I added two false percs that I got from another member. For some reason they chase and lunge at the chromis all around the tank and I am afraid they might hurt them. I noticed one of my chromis started looking splotchy after being in the tank with the clown fish for a couple of days. I did not think percs were very aggresive so I guess I do not know if I should get rid of them, the chromis, or add any other fish. Any advice would be appreciated, thanks.

Mike
 
no anenome and they swim all over so I do not know if they are being territorial, but i guess maybe switching some stuff up might help?
 
My female perc aka the Beast thinks she rules the tank
She will
Digs giant pits in the sand bed
Try to bully my tangs
If I move or rearrange my rock or corals
She will bulldoze them out of the way
Ken
 
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