Cannot put that water source on a timer currently - so best can do is to turn it on can manually first thing in the morning. River water temp dropped by two degrees today as we got got a haze that set in - and air temp only got to 90 degrees compared to the 100-105 it has been the past few days.

Put in 12,000 gallons of river water and ran the sprinkler for 4.5 hours - so hopefully that is helping along with the air temp drop. No morts found today.