I originaly bought that as a plain old Acro frag. It was a sort of Tangerine color when I bought it. After about about a week in my tank, the tips started to turn blue. After a couple of months, it was a nice solid blue. Because of the shaggy looking polyps, I guessed it was a Mille. Oh yeah, in my tank it was under a 400w Saki and some VHO 03's.
I'm sure with you nitrates down, it will continue to change until it is solid blue
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