Hello. On a recent Costco trip I happened across the fiddle leaf trees and purchased two. One of them has developed little tiny black spots on the undersides of the leaves. They are unlike anything Ive seen on any other thread which makes me scratxh my head as to what it could be. Im sure the plant had been overwatered prior to my Purchase. I immediately removed the soil and then repotted. I watered them thoroughly that day (its been about a week or so) and haven't done so anymore. I did leave them outside that night and temps dropped to upper forties plus it was rainy. Im not sure if that caused any of this. Just curious if its a fungus, what is the safest way to treat it?