Hey guys, I am still all new to this. I have just gotten my new RO/DI system up and running. Curious to know what kind of readings others have, if anyone else has checked it. I bought the aqualife RO Jr 100gpd system, then added the aqualife Dual DI filters as well. Everything had a 5 gallon flush prior to testing. Our local tap water is really hard, and I do not have a softener. I have to say I am pleased with the results. (Unless someone tells me otherwise!) Results LFS 0059ppm City Tap Water 0320ppm Aqualife RO Jr 0014ppm RO Jr with Dual DI 0000ppm Plan to test my buddy @4FordFamily water this weekend!