Yes, I continually run carbon. I am also running it in the skimmer collection cut to knock out smell. I am injecting 40mg/hr right now, on and off with the controller. The probe is in a high flow area in the sump so no algae will affect its performance.
Just wishing I had a bigger cabinet now, all these toys, ballasts, reactor bottle, reactor are all starting to take up all the space. As soon as I open up the doors to the cabinet you can feel this woosh of heat come out.