I watched them grouting the wells and it seemed like they got a lot less grout in one than they did the other. Perhaps as much as 90% less but I didnt babysit them every second so I cant really be sure. Yet, Ive still been suspicious that one of the loops is far less effective than the other. Im wondering if my loop temps are indicative of one of the wells being less effective or if they are normal given the record setting heat lately? It still keeps the house comfortable and energy usage is still lower than last year so it certainly passes that test.