I wish to change my previous statement that I wish I had put in an open loop system. No maintenance of the closed loop is a better deal IMO. Against the GT mfg. recommendations I have installed bottom diffuser aeration and my bill has only increased about $30 running the aerator 24/7. This is about what I expected to run the compressor. If I want to fill the pond I could always put in a well and fill it, no reason to spend the money to pump groundwater in years when it's not needed. My system on a new build only cost about $1100 more than a conventional heatpump/electric system.



"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge." Stephen W. Hawking