I'm trying to get a hold of the chemicals I need to do water adjustments:
Calcium Chloride (CaCl2*2H2O)
Epsom Salt (MgSO4*7H2O)
Baking Soda (NaHCO3)
Canning Salt (NaCl)
Epson Salt, Baking Soda and Canning Salt are all very straight forward.
I'm having trouble getting the first 3 locally. My local HBSs all suck. None of them carry water adjustment chemicals. I tried a few of the local water places, they don't know either. My local garden center carries all 3 of them, but I'm assuming I need a food grade product? I also found Calcium Chloride in home depot with the hot tub chemicals, but that stuff scares me too.
Is this true? or is Gypsum just Gypsum, and the garden stuff will be just as pure as the food grade? I know I ran into this with getting CO2, food and industrial are the same, but chemicals are different than gases. I don't need anything at the moment from the US online suppliers, so it seems a waste to pay all that shipping and duty/taxes for some chemicals. And the nearest decent HBS is 5 hours drive (10hr round trip). This is why I have my own grain silo and hop cooler (not really, but pretty much).