Herefishyfishy
Smart Bass
Fishy - The fish that died looked like she might have Ich - small spots covered her entire body. The other Heniochus has looked similar off and on since the trouble began. I realize that I have not included that fact in my posts. That's why I wonder if Moses the Tang has the same thing and whether the whole tank is affected. I will try to get another picture of Moses to post.
When you say "chronic" what do you mean? Moses was unblemished until a month ago.
What I was after was if it could be a short term secondary fungal or bacterial infection.
I would call a month long condition of infection "chronic" but this is subjective. HLLE is a better example of chronic and a small infected scratch would be more accute.
As to the other fish in this display having confirmed ich, if the tank hasn't been properly treated it is still there and the primary suspect.