Hey all!! I'm new to the forum and the reefing community in general. I have had my tank up and running for 6 months and everything has been going great. Its a 38 Gal tank with 50lbs of live rock and 40lbs of live sand. All my levels are great 0 nitrates, 0 nitrites, 0 ammonia, 8.1ph. I have 1 watchman, 1 royal gamma, 1 blue reef chromis, 1 clown, and 1 six line. All the other fish are doing great and no sign of stress/disease. I did remove the goby and put him in a QT tank. I been trying Maracyn 2 on him with no luck. im attaching a pic. Some help would be great...