Have cipro on hand.Yes you can treat whole tank using @AquaBiomics thread as basis for treatment protocols and dosing instructions.
I think @fishguy242 is right though. Whole tank treatment is not necessary here on new piece. Id get the piece in a bath asap though. Probably correct that the coral is to far gone. Wouldnt hurt anything to try a bath for a few nights though. If you have cipro on hand.
I just dipped in furan2 this morning. I’ll start the bath cipro method tomorrow night.