According to the temp reading on my heat pump it's 69 degrees,just happens to be around the same as the air temp. Right now. Last I checked was at 1 pm. I read here that it's best to close when water temp is 60 or below.
Now I know the temp is going to go up n down this time of year but when do you take a shoot n just close. Don't want to sound paranoid but every spring I open to a swamp. Thanks