well, first that phosphate level is extremely high for SPS. What you're describing sounds like bleaching, in the absence of a photo to prove it, and it could be caused by any of a number of factors including water quality. In the case of light not being sufficient, what you would generally notice is that the corals otherwise appear healthy but are getting browner in color, not lighter. Also, the alk is a bit on the high side, prob not enough to cause what you're describing if everything else were perfect, but it's not, so..... Any chance you could take a photo for us?
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02-11-2010, 09:34 PM
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