Your current lights are very BLUE. You have more daylight spectrum on yoru QT so you see the real color of the fish. Under water, red is aborbed first, and blue last. Your lights being skewed in the blue spectrum make the red appear black. If you add some 10k light to offset that you will see the natrual color of the fish again.
lights will allow you to have more SPS
coral, though the T5s are fine for most others. What corals do you want to put in your tank?