gray leaf grows out almost all fungus out grows within the first week and will have no effect on the sod. My pool evaporates about 1/2 an inch a day now and its in an enclosed cage so its partially shaded. One inch won't even soak threw new sod so it will barely reach the root system. Like I said I have no issues with my sod and almost every pallet you get will have fungus as ric pointed out. go put a cup of water outside in your yard with an inch of water in it and see how long it takes to evaporate. I bet its gone by noon.