I think you’re unlikely to get much helpful advice if you don’t answer the questions. I’m not trying to be passive aggressive here, it’s just that we have no way of knowing what the problem could be if we don’t get through the diagnostic questions. (Ex: 6 or so tablespoons of salt is useless if we don’t know tank size; ‘bacterial meds’ ? there are dozens of commercially available meds... we don’t know which you used already for how long and what dosage.)
We’re not vets and we don’t have a tissue sample to look at under a microscope so we rely on the information you give us to look for clues.
If you could thoroughly answer the questions from my previous response and from this thread it would give us a jumping off point: