You can help the fish kick it by reducing stress and elevated temps help speed the parasite life cycle along. Reducing stress comes in many forms, effective feeding with quality foods... removing aggressive tankmates that antagonize the others... stabilizing water parameters if they are variable at short time scales (within the day or week, like you would not want swings in temp or pH that are high, or salinity)... maintaining a stable temperature and running it in the 75-79 degree range 24 hours a day/365 is a goal for most marine fish. Many people don’t know that tank temp drifts for them unless they check frequently or have a controller and use it. I hope you can get the fish healthy. Some think you have to go fallow and QT in separate tanks to get rid of it. I personally don’t think I would do that to a fish or group of fish unless I had a great appropriate QT system for that purpose. Most people don’t. It can be made a non issue with other methods.