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Topic: A way to use Hydrion "hardness" test paper (2 msgs / 33 lines)
1) From: dewardh
In a glass pot add 1 cup of the water to be tested, and mark the level.
Add 4 more cups of the water, and boil to reduce to one cup.
If there is a white ring on the pot the water is probably too hard ,
otherwise allow it to cool and test with the "sensitive" Hydrion test paper,
which now reads 1-2-3 etc. grains per gallon re. the "unconcentrated" water.
Or buy a "liquid" test kit instead . . .
Deward

2) From: Ken Mary
<Snip>
Absolutely buy a liquid test kit. They are cheap and available in most pet
shops. They rely on an easy to see color change from pink to blue. I use an
Aquarium Pharmaceuticals kit with a resolution of 10 ppm hardness per drop
of reagent. I have used pH papers that showed all the colors in a "spectrum"
that traveled beyond the original wetted part, while the wetted part turned
the color of plain paper, perfectly useless. I would have even less faith in
hardness papers that you have to read from a color scale that changes from
reddish orange to orangeish red.
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