Keeping green terror and Jack Dempsey together in a 55 gallon their both about the same size around 1.5 to 2 inches my jd doesn't leave my gt alone how can I fix it or improve it I'm new to the aquarium world.
Break lines of sight as well, if they can't see each other as easily they are less likely to get aggressive. More deco as "ehh" said will help as well, try to break the deco into sections so they have territories.
