I am having a hard time deciding which fish to add. I have a 75gal reef with about 70lbs of live rock, live sand. I currently stock a sailfin tang, a sand sifting star, my cleanup crew, and tons of corals. I want another fish. I had my eye on a coral beauty at the lfs but It has a white mark which might be ick, and I woudnt want to risk it. Any ideas??? Thanks a lot