Just wondering what is a general starting point for irrigation in the coastal southeast. I mostly service centipede, and set two days with rotors on 22 min, spray heads 15. Am I close?? I know there are many variables, but I was wondering about ballpark estimates. I read on the Clemson extension website to use cans to measure the amount of time it takes to get 1/2" of water, or to that effect. Any tips would be helpful, thanks.