Hey Wagz-
A single chevron would do nicely as the only tang in your tank. Just so you know, they lose their brilliant blue/orange color when they age and turn a darker olive color. Here's a link to a nice pic of a darker one....still a very nice fish.
http://reality.sgi.com/tritran/reef/chevron.html
Here's a link on keeping them:
http://saltaquarium.about.com/blpick...htm?once=true&
Here's a pic of one completely changed:
HTH-
Brooke
I forgot minimum tank size recommended is 100g. They get about 10" long.
[ 08-30-2001: Message edited by: Brooke ]