Ditch the T5s unit and add some MH?

[viperfish]

Also keep in mind that on a four bulb fixture with two actinics, you only have two bulbs doing the work. The actinics do nothing for coral growth. Like Kevin said, go with the higher quality bulbs. You could also use a higher spectrum bulb instead of actinics for the blue look, that way you make use of all four bulbs and more light for the corals.