I purchased a royal gramma and I am not sure how long a fish can survive without eating. I have a nano 13.5 tank with a mandarin, clown and a few anemones. I have been feeding copepods to my dragonet as well as feeding my clown mysis and pellets but gramma is always a no show at feeding time. I fear she will end up getting buried under my live rock due to the pumps. I just hope she comes out eventually. Any thoughts? I have also purchased garlic to help entice him to come out and eat but nothing is working.