So is the wine aged enough?
Marty, if you want to use a copper based medication I'd really recommend SeaChems Cupramine I believe it's much safer to use on your fish. The fresh water dip thing is a good idea, again Seachem makes a marine buffer and if you use it you can set your pH pretty well on the button. Ich (supposedly) is present in most if not all tanks, once a fish is weakened the Ich can gain a foothold. Tangs are especially susceptable to Ich.
Doug
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