I have a 5tn Climatemaster Tranquility 27 unit and 4000sf home. It's overheating in the summer and tripping off constantly. I probably should have put more loop in the ground but the place I bought from recommended 500ft/tn which is what I did (horizontal, closed loop). Now I'm hearing it should have been double that. I'm considering a desuperheater hoping to suck some heat off the unit but also interested if anyone has any advice about just a secondary water tank to act as another source of water exchange to drop the incoming temp. I'm in a sandy soil and don't have any more room to lay down more loop. Any suggestions?