LoopTech,
If I recall the pictures of your pond its a lot larger than 1/4 acre. I think in a very small pond, less than 1/4 acre, it might be possible to keep the water temps above 60 degrees with well water. In a larger pond, I doubt you can add enough well water to be able to keep the temps that high...even at temps in the low 60's however, your fish will be susceptible to disease.
Keep us posted on your experiment...I hope you are successful and if your are, I'll try it myself.
