Coral bleaching ?

First Choice Aquatics

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Was wondering if someone could help me identify what’s happening, I think my corals are bleaching? It’s only 2 of many corals though that’s why I’m confused. I noticed one day that the coral color started to fade but the polyps were still in tacked, just looked like the colors were fading. Am I giving it to much light? I run ration AB + program not modified on 35%. Here are my water parameters:

pH 8.1
Alk 9.65
Temp 78.1
Phosphate .03
Nitrate 5ppm
Salinity 1.025
Calcium 492
Magnesium 1395


If someone could help me identify what I’m doing wrong that would be greatly appreciated.

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