Michael,
Have sent you a PM about tanks.
Have to agree with boB about having a tang and a fairy wrasse in small tanks. Fairy wrasses grow to about 4"-5" long and are better in a 4' tank. A yellow coris wrasse
might be okay in a 30g, though, as long as the tank is long. Tangs grow BIG, unless you fold them
For lighting, you wouldn't need a MH for a fowlr, and 40 watts may not be enough to get good coraline growth. Maybe a PC setup would be a better solution, giving quite a bit of light, but not so much as to be a waste on a fowlr tank.