This was the second year for our pool and it has been great because of the help from this site. When we installed it we put down some sand and put the pool on the sand but over the 2 seasons it has developed humps and holes in the bottom. This fall we plan to take the pool down and put in a cement slab to put the pool on. My ? is if anyone has done this with an Intex pool did you put anything down on top before putting the pool on it. Do we need something for a cushion or protection for the liner or is putting it right on the cement ok.