Hello,
Is it possible to have very little magnesium in my tap water that it does not show up in my tests. I have a LaMotte total hardness, calcium & magnesium by difference test kit. Before my last water change, I tested my tap water and the general hardness was 100 ppm as CaCO3. The calcium hardness was 100 ppm as CaCO3, leaving no room for magnesium. I may have performed the test incorrectly by mis-counting the drops. So to be sure, I will be testing again.
On another matter, I think the ratio for calcium to magnesium is recommended to be 3.1 to 1. So I like to know if you agree with the following:
PPM General hardness as CaCO3 minus PPM Ca hardness as CaCO3 = PPM Mg hardness as CaCO3.
Ca hardness as CaCO3 divided by 2.5 = PPM Ca.
Mg hardness as CaCO3 divided by 4.1 = PPM Mg.
Is it possible to have very little magnesium in my tap water that it does not show up in my tests. I have a LaMotte total hardness, calcium & magnesium by difference test kit. Before my last water change, I tested my tap water and the general hardness was 100 ppm as CaCO3. The calcium hardness was 100 ppm as CaCO3, leaving no room for magnesium. I may have performed the test incorrectly by mis-counting the drops. So to be sure, I will be testing again.
On another matter, I think the ratio for calcium to magnesium is recommended to be 3.1 to 1. So I like to know if you agree with the following:
PPM General hardness as CaCO3 minus PPM Ca hardness as CaCO3 = PPM Mg hardness as CaCO3.
Ca hardness as CaCO3 divided by 2.5 = PPM Ca.
Mg hardness as CaCO3 divided by 4.1 = PPM Mg.