OGgrowsanswered grow question 5 years ago hi, yes you can give the same dose, normally the PH of the tap water is 7 / 7.5 and fertilizers in general have a tendency to lower the PH, you have several products to stabilize the soil that help to correct the PH of the soil but since that there are no large constant variations in PH I think it will not be reflected in the final result. wishing you good vibes