why do my sps morph to a different color

[NothingButFrags]

I have a few sps that I bought, placed them in certain areas that I wanted. Within the last week or two, i've noticed some have morphed to a different color. I had a blue mili with yellow polyps, now its more like a dark green. I have 15K kessils on my tank, what can I do in the future or anything to prevent these color morphs? Should I have acclimated the frags the lower part of the tank first and keep moving them up higher until they get use to the LED's? Or is there nothing I can do no matter what?

 

[Finland]

Every tank is different. Color shifts are caused by different water parameters, lighting, foods, etc. I have a coral that was a light blue with light almost white polyps in the tank it came from and in my tank, the coral turned a dark green w/ blue tips and bright green polyps. If it is healthy and growing, I would not worry

 

[ssscuz]

i would say it is high nutrients in the system. sps will turn a form of green or brown colour when they go into a system with high nutrients..... not necessarily really high but i would say anything like phos 0.08, nitrates 2ppm and up.