help ive tried 2 medications and i feel like nothing is working
about a month ago i purchased 6 sterbai cories from my local aquarium store and because the the tank I was putting them in was uninhabited I didn’t quarantine them. I just put them straight into the tank because I was thinking I’d be able to monitor them fine that I noticed maybe two weeks ago one of them started to have a fungal like breakout on its skin. At at the time I had API primafix on hands but after looking into that products, I noticed most other uses said it pretty much did nothing. I went and purchased blue planets multi cure. I did a week of that treatment and I saw no improvement. I asked ChatGPT and it told me to try blue planet tri sulfa tablets and I just finished a week treatment. I don’t know if I’m doing something wrong or if the fish is just doomed or if I’m treating a fungal infection when it’s really something else can someone please help me. if the fish is doomed, is it more humane to just euthanise it because I read I read that fungal infections can eventually grow over the gills and suffocate the fish to this which I think would be incredibly cruel to just watch happen. help me save this fishy