Mike, I try to run my aeration 24/7, year round, unless temps are going to be above 80* then adjust accordingly. Summer schedule is on a week to week basis. On a hot week, I'll set the timer to turn off from around 10am to 8pm for that week.
Wisconsin summers can go weeks maybe hitting 80*, I know your area is different, but perhaps the same thinking is good, unless you nighttime temps are in the 80s too. In that case I would consider only running diffusers in the shallower areas for the hot weeks.
