ASAP means as soon as possible. I don't think quick cure would work in SW. The SW and FW ick are 2 different parasites. Also, you should never treat your display tank if live rock, live sand, coral or inverts are present. A freshwater dip and hyposalinity should work. Just set up a quarantine tank and slowly drop the specific gravity over a week to 1.009. Keep it at 1.009 for 2 weeks and then slowly raise it back up to normal. Be sure to use a refractometer though, hydrometers are not accurate enough. Also, be sure to properly acclimate to the QT and back to the DT.