I recently got 3 female and 1 male guppy. Two of the females appeared heavily pregnant, so I put them in a breeder box. One of the females now has a “deformed” left fin that isn’t moving. I’m not sure if this is a disease, fin rot, just from stress, or what. She doesn’t seem to be able to swim very well and I’m concerned. Any idea what’s going on and what I can do to help?? I’m really worried.
the fin is hard to see in the picture, but looking at the tails, they both have fin rot.
It is bacteria have to use an antbiotic petsmart has some.