Clean rainwater falls at 5.5-5.6 pH.You can water at that number every irrigation.
What is your waters alkalinity and ph?
https://extension.unh.edu/Agric/AGGHFL/alk_calc.cfm
What is the goal of pH adjusting water?
What is your waters alkalinity and ph?
https://extension.unh.edu/Agric/AGGHFL/alk_calc.cfm
What is the goal of pH adjusting water?