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Measuring KH
I have been using an electronic "pen" that I believe measures total
dissolved solids in the water. It gives a reading in ppm. I use it to help me
figure how much tap water to mix with my ro/di water. I have been shooting for
a measurement of around 120-180ppm. I have just been assuming that this should
give me around 6-9 KH and DH. Am I making a dangerous assumption? It is just
so easy to dip the pen in the water vs. doing the hardness tests I have used in
the past.
Thanks,
Trey in Tulsa, OK