Originally posted by watson.fawkes
500 mg/L Na<sub>2</sub>CO<sub>3</sub> seems a reasonable starting point. Remember though, that at the end of the day, you're
measuring the amount of Ca<sup>2+</sup> and Mg<sup>2+</sup> in your water. Some amount of experimentation is going to be
necessary until you have an estimate of just how hard your water is. |