Clown tang getting beat up by percula clown. What to do?

[fe342185]

I just bought a clown tang. he is about 3" and the pair of perculas are 2.5". One of the perculas jus wont let him rest. I shut the lights off for now. I will turn it back on in the morning. Any thoughts..
So far the tang has 2 nasty bites on his side.

[george_grat]

I have the same problem at the beginnig, I have over 8 clowns.
But when the time is running it's clown find his territory. It's natural.