two clownfish fighting

[miguel]

I have a Percula and a Sebae clown in my 30 gal. tank. I got them both together about a year ago and they seemed to be getting along just fine. Lately though they are starting to fight, its always started by the Sebae clown, the Perc is completely mellow and doesn't seem to be aggressive at all towards the Sebae. The Sebae clown though will chase the Percula around, and at times doesn't let the poor Perc rest. I don't have another tank to put the Sebae into, and my only option would be to bring him back to the store but really don't want to have to do that, do you think this is something that I need to worry about or should I just leave the Sebae clown alone because I don't really think the Percula is in any danger, just would rather see them getting along.