Thanks in advance for any help or advice. I have a zoanthid coral that has been in the tank about 1 month. Recently some of the larger polyps are turning white, and the coral is staying closed more frequently. My spotted mandarin goby does seem to be picking at the coral occasionally. The ammonia and nitrites are at 0.2 and 0.0 (so obviously not perfect) and I am working on remedying that with bio stabilizer and time. In the meantime however, how do I know if my zoanthid is dying? What can I do to cure it, if anything?