Hi all I want to increase my PH using Kalk & ATO pump

I currently run it this way just as ATO

so I have set the following setup

G4 = water 1 or PH increase
G5 = G4 and delay 200s "that means it will not pump for longer then 200s"

what I am trying to do is increase PH to min 8.15 with the ATO which is set to run max 3 min - I want to do the same with PH to run max 5 min every 6 hours if needed.

how do I do it?