So when you said:
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I feel that you'd have nothing to worry about even with tap water, unless your tap water contains something unusually toxic.
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You really meant that if your tap water is classified as "soft" ie. less than 17.1 mg/L of calcium carbonate, you have nothing to worry about. Unlike
Melbourne, most places ( San Diego, over 200 mg/L, Edmonton, 165 mg/L) do have hard water.
Just watching out for those who might ditch the distilled because you said it was OK to use tap. You have a big name around here, you should be careful what advice you give.
redleader: Hard water has
everything to do with where you live.
edit:
edit2: Sorry, I have completely gone off topic now. Mixed metals, oh yeah...
edit3: Let's see if I can save the topic by tieing the two together. Tap water, because it contains chloride and nitrate,
can speed up galvanic corrosion:
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The survey of corrosion potentials in water supplies showed that galvanic corrosion potential is increased by increase in chloride and nitrate concentrations. The effect of chloride depends on its ratio with sulphate. Corrosion potential is decreased by increase in sulphate and silicate.
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