Originally Posted by SCSInet
The only chance you will have is if you re-arrange a bunch of the rockwork to break the territories up, but even then it's touch and go. You have a little bit of a good thing going in that the new Tang is much larger than the existing one.
Still though... the price is not right if one kills the other one. If your existing tang is not getting any bigger it's because his growth is stunted due to environment, or his diet is insuffient to promote growth. Both are bad; the idea that a fish will only grow as big as his habitat is a myth, so you should seriously consider your Tang's situation(s).
I am seriously considering this decision and both Tangs' situation. I agree with rearranging LR which I plan to do as I am also adding some that I have just cured. I will add the new Naso at that time. I will not allow these Tangs to harm each other. I will keep a close eye on them and if it is bad I will simply remove the new one.
As for my Tang having stunted growth I question that. I have fed these fish a variety of different food from flake to Nori to frozen enriched brine, Formula Two pellets and frozen cubes, and various other frozen foods. My fish are babied. I have lots of flow in the tank and plenty of filtration.
My biggest question was not one of whether the tank is big enough, but if these two Tangs of the same species will get along or not. I thought maybe someone else had tried this and could tell me either "Hell no they will fight each other to the death", or "They get along great in groups". I have yet to hear either - just that my tank isn't big enough. This hobby is all about opinions and I realize that. IMO my tank is big enough and until I'm proven otherwise I plan to introduce this new Tang within' the next week or two to my 155gal. bowfront. I appreciate your opinion and it is noted.