F
Fish lover
Guest
turn off the light? Not all my fish get stressed and died just one its a yellow tang have 5 other fish that are fine when i turn the light off but my yellow tang gets a bright white line threw the middle of him and after a few hours he turns a little black in the middle he has plenty of places to hide in live rock my water is pretty good and he is in a 100 gallon tank with all compatible tank mates I dont know why he dose this please help!!! I have had other yellow tangs that do the same thing so I know its not just this fish but have no idea what to do or why this happens please help !! thanks !