I live in Georgia, and want to keep our new vinyl pool open during the winter. It doesnt get too cold here. Our pipes are buried very deep, like 4 feet down. We have freeze protection on our plumbing. We have a Aqua Rite SWG that has been wonderful compared to our other other automatic chlorinator from our old pool at another house. Our pool has been crystal clear all summer. Problem is, we want to keep the pool open and not close it. That is common here. We dont have a heater. The water temp right now is 71, and our salt level is at 3300. What do we do? We have no cover. We are filtering now about 3 to 4 hours a day. The pool cleaner gets all the leaves that are falling. This might sound crazy, but we are new to this SWG thing. What temp does the SWG stop working? And....how does the pool get chlorine after that? Do we add shock, and will that register on the readout on the SWG? Does the system shut down all together?