Currently I have my brain located almost directly under a 250watt Metal Halide. Its about 16 or 17 inches deep in the tank. The flow it has is pretty solid, not horribly strong though. My question is that my brain looks like it is starting to bleach out. I say this because it is starting to get a whitish pale color in its center, when normally it is a vibrant green and purple. Is the lighting to strong or is it something else? I had in in another tank under the exact same pendant for a year and a half and it was fine, what could it be??? I also think that I fed it a little to much the other day, I usually on give it some pellets every two weeks but I think I poured just a tad to much. Could that be it?? By the way my Nitrates, Nitrites, and Ammonia are zero with my Calcium being over 400.