If you are running the pump in reverse, you need the Alternating Gyre video. Regardless of running it in contact speed or pulsing, you are still running it in reverse so you need to program it the same way as you would alternating gyre mode. The only difference is that instead of pulsing, you would just run it in constant speed. You still need the Y-Cable and then two Variable Speed Outputs on the Apex. One output tells the pump how fast to run and the other output tells the pump which direction to run.