I have 2 Kessil A160's and an AP700.
Parameters hover around
7.5 Alk
400-430 Calcium
Mag 12-1300
I got lazy a few months ago with dosing after my calcium reactor broke and it didn't seem to have any effect on my zoa colonies at the time. They do seem to like the kessils. I keep the the AP a bit more on the white side of the spectrum and the 160s fairly blue at 100%. Ill get the exact color/intensity tomorrow if you'd like.
I also feed my fish heavily with a homemade soft/pellet food that breaks down into a fine powder so im sure they are getting a ton of that too.