I had my gsp colony lose all its green, star polyps turn brown, and then not open up at all. This is the first coral i ever bought in sep 2017 and today it is closed up still but looks alive... Just not open up. Idk what is going on. I did have a ph crash that killed more than half my coral. Im guessing that was what caused it to lose its zoxenthelle and close up?.. Still learning. P. S. Dont mind my spelling lol
In the pic the colony is on the top right .idk if we can see it