Frogspawn head lost it's Bubbles

[allarena]

Hi, I'm new to the hobby nad it have my tank set up 2 months ago. I just added a 2 headed Frogspawn and one of the heads seems to have lost all of its bubbles. The other head seems fine.

Is this something I should be concerned ?

Thanks for the help.

 

[tzabor10]

Wow that rock looks covered in coralline algae. Did you do cultivate that or did it come that way?

I can’t see the troubled coral. Was it in the first picture?

 

[Mr. Mojo Rising]

I can't tell if the polyps are turning black or if its black jelly disease. Can you list your parameters, nitrate/phosphate/alk? What kind of lighting and flow do you have? Tank is obviously very new, I suspect low nutrients which would be normal in a new tank, even the zoa's don't happy.