Powder blue tang vs Regal tang

[naesco]

http://wetwebmedia.com/powdbluetg.htm

Choose the regal because your chances of success in keeping the powder blue tang is poor.
I agree with the advice to get one from someone who has already had it for a while if you are set on getting one.

Powder blue tangs typically live for a while than get sick for no apparent reason and die often taking a few of its tank mates with them.