My ACF has been going through what seemed like a bad shed for a little over a month. Until today, she's been completely normal aside from the constant flow of shed skin. She's chubby, eating like a pig, no skin/eye discoloration, etc.

This evening, however, I noticed that there is a patch on her back a little less than an inch long that is whitish and almost a little fuzzy. Then, I noticed what looks like partially-shed skin hanging off of the area. It's mainly transparent like normal, but it's imprinted with her spotted skin pattern--something I haven't seen before.

I researched what it could be, and the main results seem to be either fungal or bacterial infection (ironically, I just cleaned her gunky filter out about two weeks ago). The suggested treatment is a large water change (obviously), some aquarium salt (about 1 tablespoon per 5 gallons), and Maroxy or Stress Coat. The sources I've seem evenly divided on which medicine to use, so I thought I'd ask the hobbyists here.

Long story short, if anybody has experience with treating infections with either Maroxy or Stress Coat (or both!) I would appreciate hearing about how it worked.
Other treatment recommendations are also very welcome! Thanks for reading.