Hi, my tank is 3 month old. I have bought a toadstool coral 1 month ago. Initially it was not opening at all. I have moved its place 2 times to higher lights and flow area, I can say it’s opening a little bit now. But definitely not happy, fully opened. When I bought it it was more fat, not as if it is shrinking. 2 day ago I have seen few lesions in the stock and umbrella. I am new to hobby, still learning. Parameters are ok. Initially magnesium was high (1450ppm, now 1350ppm). Just building up some nitrate like 5 ppm. Other corals (zoa) are good. I want to know is that toad stool is dying? Do I need to remove it? Attached few pictures for reference.

