As others have mentioned you need to leave the tank empty for 45 days at minimum to starve out the disease.
Do not dose API general cure. It is not Reef safe and will kill your corals and inverts. There is unfortunately no Reefsafe medications to sterilize your tank other than waiting 45 days to starve the disease.
This is why it is absolutely imperative that you quarantine any new fish in copper/cupramime in a separate tank or just buy them pre quarantined.
The same goes for corals and inverts (shrimp, snails). They must be housed in seperate tanks for 45 days before adding them to your display tank. (You can’t treat them in copper)
Good luck! :)