| In the Los Angeles, CA area (Glendale), where I am now an escapee from, we had Colorado River water, about 400 to 500 ppm. Mostly black tips on Cymbidiums which I never paid much attention to since that was the only effect. Coulden't grow Disas, and other very sensitive plants. I have 500ppm now on a well, but moved to RO water very quickly after the move, but again, the Cymbidiums got well water or potassium softened well water for the first 2 or 3 years (out of 4.5). Now everything gets RO water unless I want to give the plants an extra dose of minerals.
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Cynthia
Prescott Orchid Society  |