Id still try and get them into a qt. It might be the only way to 100% rule out the other fish. Especially since you dont see any worms. I wonder if it could be another form of external parasite. Maybe treat with general cure or parasite guard if you can find any.There are no worms, when they looked like this the Cb fish was absolutely coated. I watched this tank for a good hour before and after lights off and no sucking or biting happening, just nudging and floating around.
GL hope they heal up soon.





