Help with apex

[BaileysTank]

Hey everyone, I have an avast marine kalk stirrer that I love and I’m trynna figure out how on apex to add an interval where it only doses 2 gallons a night currently I have it maintaining my ph at night but it would be nice to Abe able to add an interval on top of that that stops it from dosing more then 2 gallons

 

[tzabor10]

Are you using the DOS with your apex?