Hi everyone, So I adopted my neighbors tiger Oscar bc he’s moving and put the fish in my 36 gal( I’m getting a 100 gal tank this week). I moved the tetras I had into a 10 gal tank. I have a Pleco that was hiding in his favorite spot and couldn’t get to him easily. So I put the Oscar in the tank and I saw the Pleco coming out. Well, when I went to grab a net a small container the Oscar already had him in his mouth! I was able to get the Pleco out of his mouth but now his back fins is messed up- practically he has no back fins. He is now in a 5 gal tank ( he’s a small guy) and I’m wondering what medicine and step will be the best for him to recover.