Originally Posted by Jerthunter
well that is not necessarily true, I believe the pH of DI water is about 6 (Not totally sure about this), 7 for normal water. And you want your pH to be at about 8.2 or so. Adding salt will raise the pH most of the way up to 8.2 but even if it is you should still add a pH buffer to keep the pH from changing drastically. The buffer is made so that it makes sure your water resists changes in pH. But as far as DI water having no pH, that is definately not true.
DI water's PH is 7. 7 is neutral. 7+ is Acidic 7- is Base. Learned that in Chemistry back in school. Do add buffer to your water to bring up the PH to 8.4 Adding DI water alone WILL lower your PH. As for normal water, depends where your water is coming from, it can differ from one area or one company to another. IF I remember right, our faucet water is 7+ since we don't drink base water. We definatelly don't drink DI water cause it's not good for you. Add the buffer to the DI or RO water in the amount that it needs, let it dissolve then pour into your tank. Good Luck!