When looking at the dates, the clown infection problem goes back two weeks.
That should rule out Brooklynella as your fish should be dead by now, it's a quick killer. In addition, you say they eat fine, a Brooklynella affected fish would not eat, progressively lathargic behavior.
The other option could be Lymphocystis, somewhat can look the same, but pics are a but fuzzy on my end. The good news here is that it does not čause health problems, but makes the fish look terrible. If you see little cauliflower type things, that would be enough for a reasonable diagnosis.
To my knowledge, there is no effect treatment for this infection, the fish must overcome the infection itself, but great stable water and good high protein foods can help lower stress and boost immune.
To be successful with diseases, we must be able to accurately diagnos, sorry, the pics are a bit fuzzy on my end.
In order to treat, you must make the decision of what the infection is, if you cannot reasonably do this any treatment could be worse esoecially if it does turn out to be Lymphocystis
Have a look at Lymphocystis infected fish and see what you think. Observe and record all behavioral changes, maybe lower your salinity to 1.020 which will make it easier for the rush to breath. Down in salinity can be done quickly, but going back up must be done slowly, as a note, no more than .001 or .002 per day.
A simple bucket can be a QT, or a 20g simple glass would be better.
It's a great investment for the future.
Good luck!