Hi, in my mixed tank all has been well but now 1 or 2 barbs are actively hunting 1 of my angels. The others are fine and the barbs don't target any other so why just 1 Angel ? Today it has shredded fins and is not happy. I can't move either as shrimps will be eaten. I'm considering gettin rid of barbs but maybe too late for that Angel . I saw it getting nipped and it was not pretty sight. They are constant at it so iv turned lights off.