Good point,
Here they are:
PH: 7.85
Phosphate 0.05
Salinity 1.027
Alk 10.2
Calc 480
Mag 1400
Nitrate 25 (been working on getting this down but not much seems to move it)
Are all your other corals looking OK ?
Looks like u run ur alk.and Ca a bit high but still not crazy high.
I'd feed it 1-2 times a week and see if it improves. It does look open which rules out fish nipping on it.
Is there any way to get a clearer photo of it as well as photos of the rest of your tank? Any sudden changes in water chemistry recently? How long was it doing well for and how long has it been struggling?