I thought I had a dead tang, but it has been found, was super lethargic and listing to one side, it was very colorful though. I was able to get the fish out of the tank and i set it up in a 2 gal tank i had just to figure out what i should do. From there i set up a 30 gal tank i had sitting around then, I went and got some copper to try and help the fish out. this is the first time i have ever used copper to treat any fish, so my questions are how long should i keep this fish in (if it survives) what is the process to get it off copper and move it to the display again? I have a copper test kid coming as it wasnt something i had on hand, so i dosed the copper to the directions 5ml per 4 gallons. What is a therapeutic level of copper for a fish? what do i need to know that you know and i dont (lol).