Hi, new here, I looked around and couldn't find anything like I am doing. I have a new house, it is very well insulated and 100% electric off a solar set up that I am trying to design now. Its not a huge house but about 3,000 ft. Now, I have been looking at running coils for a geothermal in a pond for irrigation right next to my house but I could put those coils in two, 2,000 gallon storage tanks right out of the well, with constant running water at 57F or so flowing through them, wouldn't that be better than coils in a pond that is most likely going to be warmer than that? Thanks for any advice.

Depends on local weather and if you are trying to heat or cool. is 57 degrees well water temp or pond temp...where are you located...

I would say pond is better....2,000 gallon isn't that much water.

Thanks, but the tank would have constant cold well water running through it so it would lack the heat a pond absorbs from both surface and ground. I could run the cold well water in the bottom and take the hot off the top and go on into the irrigation system. I am pumping a 4 inch well anyway so it looks like it would be colder than a pond to me?

I am from extreme SW Kansas, pond water gets pretty warm here, its 104 F today but the well water stays the same.

Got you....We do geo pump and water grass(aka dump)....Heat mostly with natural gas because it is 80% of the cost of geo to heat.

My well water comes into house at 50 degrees goes through my heated floors to cool the floor and then to my geo unit at about 60 degrees and exits geo unit at 95 degrees and goes to water the grass.

Why do you need a holding tank? Well not enough output?

Well, this is cattle country so you always have water for livestock stored incase of emergency. Starts off at a 2,500 gal tank, dumps into a 2000, and then a shorter 2,000, then on to irrigate. We are a long way in the country and have a fairly modern fire truck we can use with the water for fire protection. These tanks have fresh cold water flowing through them all summer so my thought is have a ground or pond loops for winter and take advantage of the cold in the summer. Thanks

How many gallons does your system consume running a pump and dump like that?