I moved into a new house that is on well water and would like to install a
pond. I had a small pre-fab pond at my previous house and would like to
build a larger pond this time (500-800 gal). Does anyone have experience
building a new pond with well water? My water is pretty hard (about 90 on
the hardness scale) with some iron. What affect will this have on the
plants and fish?

Could I fill the pond with water directly from the well, or could I use a
mixture of softened water and well water? The softened water would be
higher in sodium and potassium, but would be lower in hardness and iron.

Any feedback would be much appreciated.