October update:
Started dosing 2-part since my last update and removed the Calcium Reactor. Also stopped dosing Kalk at the same time. So far I like the results of the 2-part but I have a feeling that I'm going to be needing to mix a lot of it to keep up once everything starts getting to a decent size.
Also, I will hopefully get my 2nd Radion in the next few weeks and will dial them down to 2x80% (vs 1x100%).