They have good water, I fill mine at the home hardware store here in town. The water is usually between 0 to 20 ppm. It's perfect for humidifiers but for plants gotta fix er up with some calmag and what ever nutrients you use, usually the pH is spot on, here Anyways. It's not special water or anything it just comes from the town water and run through their brand filter. Our tap water is between 8 or 9 pH. I've thought about using straight water from them but it's a pain to go get jugs filled and shit when I can fix the water that comes out my tap, for watering anyways.