I had the circulator set to run from 0600 to 0800 hours. Obviously, that was not enough to keep open water at 4 degrees. I took the first photo at around 0800 this morning and then set the circulator to run continuously as long as the temperature is below 32.5 degrees. 3 hours later I took the next two photos. As you can see there is an area of open water along with a lot of water on top of the ice. More later......
