i think its streesed. check your water temperature. check sg check everyhting. maybe its the water. the temperature might be too high. idk you should post a pic. do a water change with real ocean water. they sell it at some stores. its called catalina water
ive had him 9 months, i hav clown pair, pink dimond goby, 6LW, RB... i think the temo might hav jumped one day when i wassnt home, i live upstairs it gets very hot