I don’t have have one of those fancy orange filters, but with my blue lights on the polyps are opening I think. I can see yellow little eyes, well mouths. But that should be a good sign, yes? All day there has been more of the yellow showing up. I’m also gonna give a little reef roids to them tonight. I’m going to be doing a water change tonight as well. Or do you think I should skip the roids and just do the water change?That could be a few things, one is rececession where the tissue has died back, could also just be very closed up or bleaching like you mentioned. A photo would help of the individual spot