#ed_op#DIV#ed_cl#Could someone please help me.. I started a reef tank in September. I have a 58 gallon tank with about 50+lbs live rock. In it I have a perc, yellow tang, multiple snails. I added a goby yesterday since the sand was red probably from the algae and I need him to stir it up. Ever since I added the goby, my yellow tang is swimming near the top of the tank with the perc, is not eating(usually a big eater) and swims with its nose down and jerky motions at times. Idetect no spots on it to signify ick. The other fish are fine. Sometimes the yellow tang hides behind the rocks.. What can I do?. The water parameters were OK when I brought a sample yesterday to the fish store prior to purchasing the goby. They have been wonderful in working with me. The ph was 7.99 and I added about 1 tablespoon marine buffer to the tank last nite prior to placing the goby in the tank. My nitrate was 12.5 kh 14. Is my yellow tang shocked by the new fish? Appreciate any input.#ed_op#/DIV#ed_cl#