Its new give it time. Fish, algae, coral etc go through shock when moved. If just today don't fretNitrate: 0ppm
I just fed the tank and saw the polyps close. I’m guessing it’s just how this one is for now. When the polyps close they seem to change from green to dark brownish. My water change is scheduled for tonight. I’ll keep an eye on it! I hope to keep it going! SPS are fascinating.