Alan, thanks for the info. I'll use your copper value of 2mg/L.
Originally Posted by Alan Johnson
Regarding iron (and as Rudi hinted at above), it seems that more iron comes from impurities in the sodium sulfite than from tap-water. Spectrum Chemical's grades of sodium sulfite contain up to .001% iron, and their sodium metabisulfite contain up to .002% iron. In my developer, that's 0.9mg from the 45g of sulfite. I'll suppose I'll add 1mg of iron and 2mg of copper. Does anyone have more data about iron-content of sodium sulfite?
BTW, I did a leader-test last night from the baseline dev that had sat for 24 hours. Density was 2.6, whereas I would expect around 2.9. That tells me the Fenton reaction isn't overly fast using my chemicals in distilled water.