[canadawest]

George, a pair would be fine in a 30 gal as they don't get very large (~3" max) and don't swim around a large area. In my 100gal (5' long) tank they mostly hang out in a few different areas, not like the tangs doing laps around the tank. They are a schooling fish (you should see all the tiny little babies hovering together) but will also sucessfully live alone, in pairs, or small harems as well.

My two adults have been together for almost a year, and seem quite happy (aka the babies) Of course it's important that when they mature you have two or more females and/or only one male per tank, because the males don't get along when mature. It's impossible to sex them until they mature at around a year old, and even then it's quite difficult to visually discern the differences. I was just lucky that the two I picked from the tank at J&L just happened to be one male and one female, but I didn't know I had a pair until the first breeding. Up until then I could only assume I had either two females or a pair but didn't know which for sure. What I did know is that I didn't pick two males, as there was no fighting.

They are very docile fish, eat most prepared or live foods, get along with just about any other non-agressive fish and are completely reef safe (never damaged a coral or invert in my tank ever) And they are pretty too!