OK... it's the white spots. I lost my clown goby on Saturday. Same problem. I did a fresh water dip on the clown goby and the problem got much worse. LFS thought it might be a fungus or bacteria, so I setup a quarantine tank and medicated with PimaFix. The clown goby went downhill very fast and died. It looked like "stuff" (flakes, balls, icky stuff) was hanging all over his body. I'm afraid this is what's happening to my clownfish now. I did a freshwater dip with him as well just as a precaution. No ammonia, no nitrates, no nitrites, salanity/ph good, temp 78, alk good, seems to be eating well. Soaking his food in garlic starting today because they said it would help boost his immune system. What in the world can I do??? I appreciate your help.