Short answer no..
This is where identification is crucial in determing the treatment to use.
IF, and that is a big question which I am not too sure in your case, IF the parasite in question is Marine Velvet then the only way to rid it is to use Copper (hyposalinity will NOT kill MV). But this is only to be used in a QT, not in the main display. If Ich, most people use hyposalinity as a treatment, but again only to be used in a QT, not main display tank, as hyposalinity will kill everything..live rock, inverts, corals, etc..
So, the only way to completely remove MV, and for that matter Ich, is to remove the host. A host (that is, fish) is needed for MV or Ich to survive...which is why I asked if you had any more fish...cuz if you do, MV or Ich will not be eradicated from the system until you go fishless for 8 wks..
Corals and inverts are not affected by MV or Ich..
If not read already, suggest you read the following sticky from start to finish:
http://www.reeffrontiers.com/forums/f15/marine-ich-myths-facts-27003/
If you plan on using Copper at any time, read this:
http://www.reeffrontiers.com/forums/f15/copper-treatment-use-problems-27005/