Robert,
I had a yellow tang go through a small bought with black ich several years ago. The fish fought it off without any treatment, but if I remember correctly, black ich is a tang specific disease. That would be why your other fish are not affected. That's about all I can remember about it. I'm sure someone else can help more with treatment, etc.
FOX
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members.xoom.com/KoryFox/index.htm
I had a yellow tang go through a small bought with black ich several years ago. The fish fought it off without any treatment, but if I remember correctly, black ich is a tang specific disease. That would be why your other fish are not affected. That's about all I can remember about it. I'm sure someone else can help more with treatment, etc.
FOX
------------------
members.xoom.com/KoryFox/index.htm