I have a beautiful purple bubble coral from Australia. It's one of my favorite pieces. I came home today and found this there's nothing close to it except another bubble coral Nothing that could have stung it from what I can see. It checked on my levels magnesium was a little low. But for the most part I can't figure out what would cause this. It's just opening up. I talked to a few people and they said it's probably going to die
Does anyone have any idea what could cause this. Or if there's any way I could save it.
The first photo is what it looks like now when I came home today. The second one is what it looked like yesterday.

Does anyone have any idea what could cause this. Or if there's any way I could save it.
The first photo is what it looks like now when I came home today. The second one is what it looked like yesterday.




