I must agree with Cecil Baird 1. You are evidently misreading these sources. The US EPA lists the chronic level of Iron in water at 1000 micrograms/Liter. This translates into 1.0 ppm. See what the tests results are. Meanwhile, the pH level of your well water is problematic. How this will affect your pond will depend on how much you are adding at a time. What is the present AM/PM pH readings of the pond water?
