Need advice... I am in the middle of a pool build and my builder back-filled with the clay filled soil he dug up from pool, my concern id the settling of the soil and how long I need to wait for clay soil to settle. I've been watering it like crazy and I'm leaving it dry out for a couple of days, the top layer is solid like concrete and seems very solid, but I'm concerned if it is ready for concrete deck... any advice or experiences is greatly appreciated. The over-dig for the pool is 36" and the deck will be 48" at the narrowest and over 16 ft at widest and the walls were installed with deck supports... so all of the deck will be supported by undisturbed soil at its widest point.