To answer a few questions I have very flat water. My profile looks like this:
pH 6.2
Total Dissolved Solids (TDS) Est, ppm 45
Electrical Conductivity, mmho/cm 0.08
Cations / Anions, me/L 0.8 / 0.5 ppm
Sodium, Na 4
Potassium, K 2
Calcium, Ca 7
Magnesium, Mg, 2
Total Hardness, CaCO3, 26
Nitrate...