I bought a purple tort at the market this weekend, but it is looking alot different in my tank right now. It's polyps have not extended since it his been in my tank. I have it in a good flow area. (next to two other Acro's that are happy) But it lost all its color. It is like a light greenish color. Do these take a while to get acclimated? Is it just stressed? Or is it dying? what does color loss mean for this coral. I have a surf & turf next to it that has some of the same green coloration to its tissue, light greenish but it is thriving. My water quality is good but by po4 is a little high. other wise all is good. It is high in the tank under T5. Any thoughts?