i do-
do you have one already or contemplating getting one?
some quick info is that they too, like the powder blues are very very delicate. don't adapt well in captivity.....
this of course, is what experts report, i do not have one.
i do have a white-faced surgeon (Acanthurus japonicus), commonly sold as a powder brown (actually sold to me that way, but i knew the difference in markings....)
this fish is outstanding! i recommend it highly if you are wanting a tang with the powder brown markings look-
you can email me @ hmccall@sha.state.md.us and i'll provide you the links to some articles about both species if you're interested (i don't think i can put them up here)
heather