Thanks.. its so weird the way it just disappeared
Some people are very comfortable assuming you are dealing with "ich".
In my opinion you are correct to remain skeptical.
If the rest of your fish are healthy and the tang is eating well and behaving well, I think you have nothing to worry about.
I would add that a two hour acclamation is extreme and probably did cause excess, unnecessary stress. The important part is that he appears to be on the mend! [emoji106][emoji3]
Never mind...too late.