Quote Originally Posted by Sal Santamaura View Post
Which is why I emphasized the unknown iron content of tap water, regardless of its hardness. Even if a single tap water sample is analyzed and iron found not to be a problem, variations throughout the year are inevitable.

Just like the decision to use less of a particular developer stock solution than its manufacturer's specified minimum quantity, this is a "confidence or crap shoot" situation.

While not disagreeing remember that Kodak themselves don't actually specifical recommend using Distilled or Deionised water with Xtol in their Data-sheet. Traces of Iron will cause severe problems with fixers where the Iron and Thiosulphate form a fast acting bleach. I have had minute Iron particles in water way back in the 70's long before Xtol.