JBJ 12 Gallon Nano Cube Replacement Compact Fluorescent Remote Ballast Replacement JBJ 12 Gallon Nano Cube Deluxe Style Aquarium Compact Fluorescent Remote Ballast NOTE: This new style ballast has a five-pin connector with one of the pins in the middle. The old style ballast has the five pins in a circle without one pin in the middle. JBJ no longer manufacturers the old style ballast. For the old style compact fluorescent version only. Will NOT work with the new style all-LED version.