SPS polyps changing color

[Crox99]

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I would like to know why one of my acros's new polyps have a different color that the original ones. The colony has metallic green polyps but the ones from the new growth are blue in color. Why?

 

[Crox99]

Does anyone has an answer?

 

[doubleduece]

It sounds like it is growing. What kind of acro is it?

Usually when acro grows the new growth is white due to the non presence of zooxanthe..

Are all of your parameters in check?