I'm running the same thing I've been running since I started the tank (with one minor addition, which I don't think makes a difference, and should probably remove):
Skimmer. Heater. Flow. No media, no chemical treatments other than vodka, bacteria, and food. On occasion I play with Prodibio or Zeo basic ingredients, but I think they're noise in an otherwise consistent system.
I don't think you're supposed to put either of those in your ATO. Generally you would only use kalkwasser powder (or pickling lime) in your ATO. 2 part need to be dosed separately or they don't work (they precipitate each other). Your skimmate sounds good, and sounds similar to what I'm pulling. It gets a bit darker with vodka + bacteria dosing.
I also have a marinepure bio block in my back sump, but I honestly don't think it's adding much if anything to the tank. I just haven't removed it because of the water displacement it will cause, and I haven't done a water change in a few months so I haven't had salt water to replace it. Maybe I'll do that this weekend.