Problem with my fish and the other two?

Fish can be very aggressive towards each other, especially when you have two of one king and one of another....You have three options in this case......First try and divide the tank by supporting a gl divider in the tank keeping them separated......Or, take Joey and Whizzy out and put them in a separate tank......If not you will lose Sammy....Or if your tank is big enough you could try putting a large clump of aquatic weed in the tank so Sammy can take refuge behind it like other fish do....But first make sure your weed is clean...