Hello. Since I have posted this, the clowns are completely and I mean completely showing zero signs at all of anything. The one in particular seems to be in even better health than before. Not sure what to do. The QT tank is up and running but I have yet to add them and go fallow.
Ich does not need to be visible to be present. A stress event will cause it to flare up and take over the immune system again.
I would still quarantine them and go fallow, and then quarantine every fish you get in the future. Otherwise you will just be managing ich.