I use dosing but have never used a reactor. It's pretty easy to set for consumption and I literally use digital timers attached to BRS 1.1mL peristaltic pumps because I don't like computers making decisions for me. I am definitely not the normal case though. It's only set up this way so that I have even more fine control and eyes on with my chemistry levels. It's probably more work in the long run. That said, what I do works great!