I would advise ALL reefers to read up about PBT's in the WET WEB MEDIA site hosted by Bob Fenner.
Powder Blue tangs are not recommended because of there difficulty.
If you do have one, (Like myself), you are taking the risk of killing it.
They are not meant to be in captivity.
Only the odd one will adapt.
I might be a lucky one, Im still not sure. Ive already lost one prior to this one. Its still not ideal for the poor fish though.
However the importers still bring them here, so if we dont take them, they will only die in the importers tanks i guess, and that happens regularly as far as I'm aware.
Just food for thought!