bro, ur coral is dying, it should be time to check on your water for NO2 / NO3 / PO4 .....
btw, is your light T5 or PL? cause i dont see any T5 with 22w tube?
Temp for the tank now? with fan or chiller? Cause coral need lower temp...
Just a small reminder before any life is gone again. CHEER !!!!!!!!!!