So I've read all over that vinegar is a good way to lower pH. I have recently learned that the effect is only temporary as it gases off and pH bounces back up. Agree? I bought water from the Walmart dispenser run by Primo Water and it is testing at no N, high in P, and very high in K, pH of 6.8, KH of 22ppm. I was under the understanding this was RO water and should be nearly distilled. How can the P and K be so high and the KH be a pretty low 22ppm? I bought a jug of Walmart Distilled Water and it tested at 5.1 pH before getting aerated and then it went to 6.5 The KH was 15ppm, N was 0, P was lowish and K was high also. How can distilled water be high in potassium? Thanks for your time. Peace and Good Health!