For many years, so we're talking heathly sized adults. The Naso IMO/IME will need an 8 foot tank, 240gal. The Orange Shoulder could live in a 6" 180gal for many years, and the yellow would be fine a 125gal.
Originally Posted by
jmrents
http:///forum/post/3048307
I have 4 tangs in my 135 and I would love to get a few more, but I know
that I am already pushing it with the fish I have.
With that said, I would say no smaller than 135 for the 3 tangs you
mentioned, but to be safe if you could go bigger, I would.
I know I regret not getting the 240 now, but perhaps if I ever build out
another tank, I would definately go as big as I possibly could.
I would love to have the monster 500+ gallon tank or even bigger...lol
good luck
It's not really a number of tangs problem, it's just that some tangs simply grow too large for smaller tanks. You could probably keep a yellow, a kole, and a purple happy in a 125gal, but a 125gal would just be too small for a Naso long term.