Ok, thanks. The tank is 24" deep, and I have 2x250w DE halides and 2x39w T5 (even though the tank is 48" long). I'm assuming I would need to keep this Nepthea out of the direct light of the halides? I still have it shadowed by a Sinularia sp Finger Leather. I also have some GSP...I've heard rumors that these three do not play well together. i will eventually get rid of the Sinularia when my tank grows in more, but for now it's taking up some real estate. These are the only corals in my tank that aren't LPS.