Replacement JBJ 24 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 new style compact fluorescent version only. Will NOT work with the all-LED version.
