Hi Mary Welcome to FishLore
I'm really sorry your fish isn't feeling well. It would be helpful to know your readings for
ammonia,
nitrite and nitrates.
Many times when something goes wrong, it can be traced back to the water quality.
Popeye is one of those things that's often times a water issue.
Peeling skin can also sometimes be attributed to water quality.
We need to rule that out first.
I see you're using salt, if I'm not mistaken cat fish don't do well with salt.
Can you get the readings for us?
Personally, at this point I'd do a
water change but not add more salt.