I have been reading and reading and reading, each and every person has something different to say. My betta has a bit of a tail biting issue there for it looks as though he is getting a bit of fin rot on this tail. I have asked several people on Facebook and I am getting all different answers. I would like to move him to a hospital tank tonight and treat him with paraguard (seachem). I have a 1.5 unused tank in my garage with a small heater. I have no filter for it though, does my hospital tank need to have a filter? Does the tank need a light? I heard letting them sit in the dark helps speed up the process of healing. Can someone school me on hospital tanks please. He currently lives in an 8gal, temp is at a steady 80 degrees, params are good. Thanks in advance. I love to learn as much as possible so in the future I can just make it happen for either of my bettas.