Bill - The diffusers were placed on 5/29. The run time was limited to 4hrs in the mornings for about 5 days. The timers were installed and went to the overnight run. The readings were taken on 6/7. But alas...... I did not think to take temp readings immediately prior to start up.......oh well......
I did take some sporadic surface temp/DO readings in April/May. It was amazing how high the DO was.....10-11+ at that time!!
Chuck