Yes, you can program the ACJR with the PC. I couldn't imagine trying to program it on the little display on the AC. Plus you can keep a graph running showing you're PH and Heat changes. I never knew how the heat changed in my tank when I wasn't home till I read the graph. It fluctuate 5 degrees during the day. I picked up a chiller and it only changes 1 degree at most, and my heater and chiller hardly run. My SPS's are doing 100 percent better.