How much fighting is too much? Percs establishing dominance.

[rinercl]

This is kind of a follow up question from the "Relentless Percs" thread, but I didn't want to hijack it out from under Aquarius.
I have two Percula clowns that I bought as babies about a year and a half ago. They were as happy as can be up until about two months ago. Since then they have been fighting pretty hard with each other. Neither has managed to do too much damage to the other, but they go at it pretty good sometimes. They will circle each other and bite each others mouths and chase each other around the tank.
It is my understanding that this is all normal. When they reach maturity they will start fighting to establish dominance. One will eventually win out and become the female. The other will be male. Then things will be much more peaceful and everyone will move on with their lives.
The thing I am not sure of his how much fighting is too much. I am not sure if anyone has ever had one clown kill another, but I would think it is a rare occurrence. I am just planning on leaving mine together unless one looks like it is about to die. Is this a good plan???

 

[invertcrazy]

If both are the same size that is your problem. As they get older they will fight for dominance. You might have to trade one in for a smaller one or a larger one. The larger one will become the female and the smaller one the male. Someone will correct me if im wrong. hth