Tangs Tangs Tangs. Some Qs.

[fdiddy]

So today I brought home a Purple Tang from Bayside. Beautiful specimen. I started by putting the bag in to equalize the temp. Once I did this my Clown tang seemed to be fine. I let the Purple Tang go and they had a small squable and moved to their corners. The purple tang being a little more stressed obviously was not the aggressor at this point. I removed the clown tang and he is now in my sump (Don't worry, it's 90g of room in the area he's in). If I move some rock and let the purple tang establish himself a bit, can I add the clown tang later?