Help, coral deterioration?
 

I noticed that my hammerhead stalk looks horrible a few weeks ago. Tonight as I look closer it appears as though some of the other stalks are developing small holes/cracks. My frogspawn appears to have tiny holes as well.

Any idea what this could be?

At first I thought maybe something was munching on it, now I am not sure what to think.

Whats your CA and ALK levels like?

Calcium is usually 350, Alk is 8