So, just got my water report back from Ward Labs, and a few numbers jumped out at me:
Total dissolved solids: 524 ppm
Sodium: 159 ppm
Sulfate (SO4-S): 26 ppm
Chloride: 150 ppm
Total alkalinity (CaCO3): 84 ppm
So, with as much as I'll need to dilute this stuff, am I better off just buying...