Thanks for the advice guys luckily they have calmed down.
I was also thinking about taking the Yellow tang out and putting it in a spare tank for a little while, but it seems that time and the rock work movement was a good idea.
I thought i had completely blocked off the yellow tangs caves entrance to the opposite end of the tank but there were a few little spots where it was still sneaking through and early this morning was still harrasing the new tang. I blocked them off and came home tonight to see them great together, they still come up next to each other now and then and do the whole lateral line vibration thing but thats it and they go about there business.
The only time the yellow tang is still aggresive is when the
Naso tang is at the entrance of the yellow tangs cave. But otherwise i seemed to have created a neutral zone where they both graze and ignore each other which is good.
Im a bit worried about the stress the initial fighting caused, the naso really got a bad beating. Ive put some stuff in the tank that will improve the fishes "stress coat" and it seems to be grazing well ill just have to keep an eye on it.