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Re: [APD] Alternatives to the color GH test kits and methods
Jerry Leong wrote:
> If you are getting the water from a water utility, you can probably get
> the info from the utility co. They will probably have the info as ppm
> CaCO3 (or ppm Ca) (be sure to confirm which one they give you). While
> the info may not be that accurate (e.g. my utility gets groundwater (ca.
> 90 ppm CaCO3) and water from MWD (ca. 180 ppm CaCO3), it will provide
> enough data for those colorblind individuals (or those who do not have
> test kits). Of course, you would either add back the appropriate amount
> of tap water or (if you know what the ratio of RO/wastewater, you can
> calculate the hardness of the wastewater) wastewater.
Ya. I know the GH of the tapwater (11 DGH), but I do not know how much
my R/O unit throws away in relation to what it produces. I didn't want
to have to find some way of measuring the output of both streams
I had thought of adding food coloring, but I couldn't think of a color
that, when mixed with orangish-red would produce something that
contrasts with that same color mixed with green.
I thought about:
blue = purple -> blue-green = maybe, but unlikely
green = brown -> green = nope
yellow = orange -> yellow green = maybe, but unlikely
I may figure out some sort of mix of tertiary colors that works. Might
be an interesting experiment. This assumes that food coloring is inert
for this reaction.
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