Walt,
1. I would tape paper over the sides of the tank with sick fish to minimize stress and drop SG in the system to 1.020 - 1.018. Adjust readings of your swing arm hydrometer to the temp of your system. You are welcome to borrow my refractometer, BTW and take a look at the meds that I have. Up airstones gradually, check pH after adding more O2 to the system.
Turn the pots 180 degrees, so the fish can hide. Turn the lights out, turn them on to feed clowns that are eating. Don't even bother with the ones that are not. They can go without food for a week min. Less pollution to the system.
2. Don't be too meticulous about cleaning the glass, syphoning, water changes, etc. Stability and peace for the clowns are more important when they are sick, IMHO.
3. Several fish have torn fins, I would lean towards a bacterial infection going through the system. You are using Furazon, right? Let us know the dosage. And test for ammonia. What test kits are you using?
4. Caps have clamped fins and fem looks like she is full of internal parasites. They are highly neurotic fish, need a lot of privacy. Give them something to hide in, maybe an artificial anemone, or a coral that you can sacrifice from the main system.
5. Don't stress too much. We all have faced disasters. And only learned the hard way.
Best of luck.