Question for you folks re: Ward Labs test.
W-5A Brewer's Test: Sodium, Calcium, Magnesium, Potassium, Carbonate, Bicarbonate, Chloride, Iron, Sulfate, Nitrate, Electrical Conductivity, Est.Total Dissolved Solids, pH, Total Hardness (Lime), Total Alkalinity & Total Phosphorus
W-5 Household Complete: Sodium, Calcium, Magnesium, Potassium, Carbonate, Bicarbonate, Chloride, Sulfate, Nitrate, Fluoride, Iron, Electrical Conductivity, Est. Total Dissolved Solids, pH, Total Hardness & Total Alkalinity
W-6 Household: Sodium, Calcium, Magnesium, Potassium, Carbonate, Bicarbonate, Chloride, Sulfate, Nitrate, Electrical Conductivity, Est. Total Dissolved Solids, pH, Total Hardness (Lime) & Total Alkalinity
The W-6 is ~$9 cheaper, and looks like the only difference from the W-5A is phosphorus and iron. Phosphorus doesn't seem to be listed on the Brun Water spreadsheet... and I know from my city water report that there was no iron present.
Or should I just spend the extra $9 and stop being such a cheap funker?