I'm the most concerned about the red edging of the wound. It's just a tiny bit, but still worrisome. When I was changing the water, he had freaked out and hit the gravel, and I saw a little piece of fin come off. It's a tiny tear which I'm sure would heal with clean water, but I really hate that it still looks bloody.
His tail fin has always been in bad shape. I had an accident with him when I first got him which involved him falling onto the table when I was doing a 100% water change. I had to grab him with my hands to put him back, and there were huge tears in his fins. The holes healed, but ever since then he's had a split tail that never healed, and the ends look tattered. He's an extremely aggressive fish, always flaring, which probably doesn't help his tail fin. He's recently been getting quite a few tears on his tail because of the gravel, so I think I'll take it out and maybe using marbles instead.