long story short. my refractometer was way off. this is all my fault and I feel horrible about it. as I had not calibrated. anyhow I had just put a small Scopas Tang into the tank and it was in the aquarium for over 30 hours before I caught the error. I have slowly dropped salinity down to 1.026. is there any chance the fish will survive. its swimming and alert. has lost appetite and unfortunately has sunken belly. any advice would be appreciated. I had had a pair of clown in the tank for couple of months who are and have been doing fine. I noticed the change in the Scopas after 24 hours but did not catch the refracto for another 6 hours. so mad at myself right now.