ich will forever be there. salt water aquarium sure wont run away from ich. to be honest. copper is the best treatment but it's not reef safe. for me when i start out this hobby i die lots of fishes due to in-proper acclimation of fish. water parameters problem. i learnt my lesson hard. just get a QT copper treat it for 2weeks-1month. depend on your liking. i tried 3months copper treatment for new fish and acclimate then more then usual before going in main tank. it works well for me.