Hey all, I've had this green sinularia now for about 10 months now and it's always been doing really well, even growing fast but this past week it hasn't been opening up and I'm not sure what's going on with it. Last weekend I was out of town for an engagement party and living in Cali my ATO was running extra hard with this heat wave and ran out of water so when I got back the salinity was really high and my return pump was throwing small bubbles cause of the low water, I quickly replaced it and everything's bounced back within the next day except my sinularia, I see this black stuff on it and worried it's on its way out. Anything I should I do to help it? In the photos you can see a small one that I fragged off of it a while ago since it grew so fast that's doing fine but the big one looks shriveled.