Pretty sure the house well pump runs on 110 but I'll double check to be sure.
One passing thought I had is to insert a tee in the line from the well to the pressure tank and put in some ball valves to divert to a pond-only connection that would be hooked up as needed. Probably also need anti-siphon valves. Not sure it that would work or even be up to code but it seems like it could be done on the cheap. Still would need a way to trigger the pump since that connection would be before the pressure switch.
Well drilling in Indiana needs to be done by a certified driller so a DIY solution is out as far as I can tell.
