My setup is pretty simple. I have a profilux with 3 heads. It supports 4 so I could buy another one to install if I wanted to but as it is, I only use two out of my 3 heads.
I dose Alkalinity (Baking Soda) with one and Calcium (from LittlesilverMax) with the other. I mix them and store them in 4L jugs but dose from 2L bottles as seen below.
There are two types of Profilux dosers, the standalone one (which has a built in timer) and the non-standalone one which requires a profilux controller. I have the latter because I have the controller. I dose each 4 times a day. Alkalinity is 49ml per dose and calcium is 66ml per dose. That's a depletion rate of 196ml of Alk a day and 264ml of calcium a day? Now that it is dialed in, all I do is top up the chemicals and test. When I first set it up I just guessed how much I needed. Then test every couple of days to see how much each depleted and compensated by pumping in more or less. I haven't touched the dosing amounts for about a month now.
Alk is 8.5dkH and calcium is 420ppm.