the best cure is prevention IMO
always QT new inhabitants for at least 1 month before placing in the DT.
a)start with a QT tank that has no calcium based or porous substances in it, IE. LR, Sand of any type...
b)make sure it has some 'clean' hiding places. IE. PVC piping, fake corals...
c)consider covering the bottom to avoid mirror effect, which disorients and stresses fish.
d) raise temp to 80 degress
e) hook up UV sterilizer properly
f)starting at normal SAL , 1.021-1.025, slowly drop SAL to 1.009 over 48 hours.
g)watch pH level, buff if necesary.
h)count 3 weeks from the moment there are no parasites visible at which point:
i)slowly raise SAL back up to DT level over 1 week.
j)drip acclimate and enjoy your new inhabitants