Just started Coppersafe in qt. Day 2 bringing up the levels. If this is Brook, I can get a formalin bath going here immediately. Just looking for confirmation.
That is good for breathing, but I just do not like the reddish streaks or the rough area before his tail. Of course could be the picture or glass or something. Keep us updated.
Formalin is my go to. I know it is not for everyone, but I found it to be safe and effective. I also got the recommendation from a fellow vet tech that works at our public aquarium. Just use gloves and do not get in eyes or mouth. No drinking it!