Bubble Coral trouble

[samrggzy]

So I have had a bubble coral in my biocube 32 since I around January when I first started the tank. It was a small colony that was doing great for a while up until fairly recently. I have noticed it is closed up most of the time and has a brownish algae it seems on part of its skeleton which can be seen in the pictures. I have not changed anything in the tank and will post my most recent parameters. I also have a large hammer colony, acans and a kenya tree which are all doing great which is leaving me confused about the bubble. Any ideas on what can be bothering it so much?

temp: 78.1

salinity: 1.025

alkalinity: 8.9

calcium: 395

magnesium: 1350

nitrate: 5

phosphate: 0.07

ph: 8.0

 

[LordofCinder]

Its hard to see in the pic, but it could be brown jelly disease. Its a bacteria that infects weak/stressed corals. It will kill your coral if you don't do something. You can try to dip it ,or suck it out with a baster.

But the brown jelly only infects stressed corals, you need to figure out why the coral is stressed and try to correct it.