Something seems to be going on with my hammer coral. I have no idea how long it’s been going on for because I’m at college. My sister has been doing a fantastic job taking care of my tank but she sent me this picture this morning and doesn’t know what’s wrong and neither do I. She said she first noticed it 2-3 days ago. Some of my other coral seem to be affected by this, what should I do? I’m thinking of just having her pull it out of the tank…

