I'm not saying it is fake, I'm saying that distilled water shouldn't give a 0 tds
reading. It can be...but I'd never count on it. U.S. guidelines for the TDS
of distilled water is UNDER 10 ppm
, where tap is generally defined as running between 2-300 ppm
...though this can obviously vary from where you live and so on.
I've never personally tested the TDS
of the distilled water that I use. Just watched the differences in algae growth from one brand to another to find the one that is available to me that works best, with the least amount of growth. This is something that I have considered getting a pocket TDS
meter and getting readings that I could actually show to others considering the same thing, but have never done it.