Yesterday I got two bristle plecos one albino one regular. I put them in my five gallon tank to quarantine them. Today when I started my water change I couldn't find my regular bristlenose pleco, then when I added water I saw him on his back severely injured torn fins and bite marks but breathing so I put him in my small container I use to take out water and hung it in the tank because I don't have a heater for my other tanks yet. I toke out more water and added fresh clean water. Is there anything I can do to save this fish? I don't want him to die and I feel really bad I put them in a small tank together I just saw them together at the store and thought they'd be fine for the time the quarintine time.