All water samples were fine Harmonia was between 0 and .25 nothing visible on the microscope. Used some iodine and then some new skin returned to pond. Any thoughts Thanks Norm
Treating with iodine is good, you don't need to repeat the treatment since iodine cauterize the area so just let it heal.
Personally I've found scoping to be hit and miss, one really needs to collect multiple samples across the whole body of the fish to be sure.
In which case I usually just do shotgun treatment: 3 proform-C + 2 fluke-M to be safe.
Any other fish showing symptoms?
I don't like ammonia value other than 0, what's the reading of other parameters? What your KH value?