Alright so around two weeks ago, I noticed that my fish's tail started to look raggedy and split. I thought it was because of the plastic plant I had in his tank and I was planning on buying him a new one, even though he's been living with the plastic one fine for probably about a year now.
It kept getting worse by the day, though, and I realized it looked like fin rot (with darker edges and everything). I started treating him with API Tetracycline. It seemed to be working and I changed the plant anyway for good measure. It was working after a few doses and I could see new growth on his tail.
I went away this went away this weekend and came back today and his tail has a bunch of new tears. I really don't know what to do at this point since there's nothing in his tank that could be hurting him and before I left, he was improving.
Should I continue the tetracycline doses? Or use aquarium salt or something else? I'm still pretty sure that it's fin rot, but shouldn't it be gone by now?
Please help :( his veil tail is starting to look like a crown tail