I run a cal reactor and also a kalk reactor on my 180. I was using two part with good results, but prior to my deployment I got the reactors to make it simple for the wife. The only problem that I have had with my setup is that sometimes the AC III does not turn on the CO2, but that is not a big deal as the PH in the reactor just goes up. I get an email and call the wife and she fixes it (unplug and replug). This is a problem with the AC III though, it must be pluged into either port 4 or 8 on the DC8. Well to sum it all up I would not switch back as this is one less thing that I have to remember to do to this tank.