28 days total, take them off the turner at day 25.
I had good luck with the dry incubation method, only having a teaspoon or 2 of water in the incubator, then in the hatcher cranking the humidity up to 70-75.
I tried the "regular" incubation method, (I've got a hovabator with a fan). That's filling one section with water for the first 25 days then filling more of them with water for hatching and got lousy results. I'm sticking with the dry incubation method from now on.