Hello everyone! I have a female Mickey Mouse platy who appears to have fin rot. When I bought her a couple weeks ago I noticed she had a small hole in her tail, but I didn't think anything of it. Well, it got worse. The hole has gotten bigger (in the edge of her back fin) and this morning she has developed an odd line down her fin. It's hard to tell in the photos, sorry! She has been hanging around the top of the tank like this for a few days and breathing rapidly. What should I do? The only tank I have available for treatment is a 1 gallon. What type of meds should I use, or should I just try salt? Thanks for any advice! Ps- She gave birth to 6 fry about 4-5 days ago. Oh also, my tank is in the process of cycling with TSS. I haven't had a large ammonia spike (the highest it got was 0.50 ppm). It's currently at: Ammonia: 0.25 Nitrite: 0 Nitrate: Between 0 and 5.0 Bump. Anyone? It's getting worse. I don't know if someone took a bite out of her tail or what but there is now another hole.