Experiment tying some threads together

I missed it somewhere…how do you know you’re losing Ca?

Water test kit for calcium.  Beerery suggested (reply #64) sending samples with and without BTB to Ward Labs and I took the DIY approach.

Cool…thanks.  I think I’d want to have the result verified by a lab, though.

Yeah, it has occurred to me that it’s possible BTB is somehow interfering with the indicator or reagent in my test kit. But in practice,  I just won’t go with such minimally mineralized water as when I started this, just in case the effect is real. Outside of Pilsners, it would probably never be an issue.