you can also lower your salinity to 1.018 and raise the temp to 82 and feed garlic and selcon seems to work like a charm. I read it on a site that a guy runs a forum on the net. I'll try and find it again and post He does recommend QT all fish before they get into DT and always fresh water dip every thing 10 - 30 Min's as long as the fish is not stressing out you have to match the PH and have temp at 80 for dip/ bath. he says dips less than 10 Min's are pretty much useless but if the fish is stressing out to much do multiple short dips in a day and give the fish a good break in between dips. This may help in severe case and lessen the stress on the fish. If you QT use formalin not copper as copper is very toxic and may very well kill the fish instead of helping it. If you have quinine sulfate, I understand it is very effective on parasites and not as toxic. found this out on the same site.

Bill