Dorothy Fitzpatrick wrote:
I know we've done this before but I can't get my head round it at all I'm afraid. My TDS meter reads 000 on my distilled water, which to me means that there is 0 dissolved substances in it.
Ode can correct me if I am wrong, but with a TDS, I think a reading of
"000" can have up to 2.0 uS in conductance. Because of the scale the
meter reads at. That is a LOT when it comes to making CS, if the "lot"
is something that has a big affect on CS making.
A PWT meter reads in tenths of a microsiemen so it can read down to .1
microsiemen (uS). I was just lucky that I chose the more expensive PWT
over a TDS (from reading about both on this list) because for conditions
here, I had to have distilled water of .2 to .3 uS in order to make
clear CS (again I could go to .4 if the water had been distilled twice).
A reading of "000" on a TDS, if it happened to actually be 2.0 uS would
have made very dark yellow CS for me.
I got my meter before I got a distiller, and similar very low uS
readings were necessary for commercial DW. In retrospect, I believe the
DW sold here then was produced locally, which means from the same water
I distilled myself with my home still. Now, all brands of DW sold here
are produced in SLC, Utah, and I just made a gallon batch yesterday with
water that read 5 uS which is still clear after sitting overnight. This
is what tells me it is WHAT is in the water as much or more than it is a
matter of what the uS reading is.
Amazing.
sol
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