I didn't see anything wrong with her physically. As far as it being an acclimation problem, that would show up three days after being introduced to this tank? The one that I picked up first died, not the one with fin rot I brought home yesterday.
We can save that, really not as bad as I expected, more concerned with the damaged Pertoral fin than the Caudal. Get together some hydrogen peroxide, iodine, triple antibiotic cream and some cotton swabs. Rest her today. swab her tomorrow.