I just got a new betta 2 weeks ago, and she's been living peacefully in my sorority tank. Just two days ago, I noticed a bit of fin rot, with white-ish stuff hanging from the end. I put her in a quarantine tank with some medicine. (I think it's Maracyn 1), but within one and a half days, her whole tail fin turned black! And I'm afraid it's moving on to her flesh!
. I'm really worried! She also has some white-fluffy stuff on her back from old nip wounds from the other females.
2 weeks before another one of my females got internal parasites... could it be the food? I found a few bugs in it recently, so bought a new bottle.
I don't have any salt on me... is there another way?