I was kn vacation for about 6 days and when i came back, blitz's fins were worse. I still dont know if its tail biting,the rot, or if hes ripping them on something(cant imagine what!) and i dont know what to do anymore! There not healing! He gets daily 10% water changes ver since this started and he has vitachem in the water. So can you identify if its tail biting or not? If so how can i fix this before his tail is gone! Ive never delt with a tail biter before. Sorry about the pic quality,he wouldnt stand still!