Try "underwater" white balance setting on your camera. It works great on mine.
I'd enjoy chatting with you about your LED build. I did mine (squeezed in 30x5W LEDs into a stock Biocube hood) and had lots of fun doing it. Too bad, I can't run it at more than half power.
If you don't have temperature and fan failure interlocks on your LEDs, then I'd highly recommend them. You must have spent a few Benjamins on LEDs alone, so it makes sense to protect against the inevitable fan failure.