The dots were gone this morning, after a nearly-two-thirds water change and a raise in the copper levels "just to be sure".
This evening, there are dots _everywhere_ on the trigger, but not on the gramma, gobies or anthias in the same round of QT. Weird, 'cause if there was a fish I'd have thought would be resistant to ich, it'd be a triggerfish with its leather hide.
Raised the copper levels again . . .
~Bruce, glad he runs a QT . . .