I have lost three fish in two days, a clown tang, a kole tang, and one of my picasso clowns... now the other of the mated pair is turning pinkish on his white part.
Water params seem fine, Temp 77degF, Sal 1.026, Ca 410, Alk 10dkH, Mag 1400, (NO2 zero, NO3 zero NH4 zero, PO4 zero, well all near...