That's really bad water my friend. I wouldn't use it. You will almost surely have issues with it. Letting it sit out only evaporates chlorine and won't lower the ppm. In fact it usually goes up a bit because some water evaporates and the dissolved solids are left behind. Check out my water thread (use the link in my signature) if you want to learn more about hard water and your different options. Happy growing.water from my tap has 550 ppm. i want to make a 100-200ppm solution for my sprouts.can i mix my tap into crazy amounts like over 1500ppm to make sure i got enough nutes in there?
i pee on people who steal stuff.gotta just find a delivery of poland spring a jack a few 5gals