hi all my name is george and ijust ordered a 12 x 18 oval pool. i was trying to search but it would not let me. so my question is about foam bottoms. we had an intex pool for a couple of years on sand the pool got a hole last summer so our kids are young and we decided to go with a permanant above ground. i saw on a sticky about foam so i am trying to rescearch it it looks a lot easier to install. what foam do you use? can i use just foam or do i need a thin layer of sand to set the foam over? how is it with foot prints after the pool is full? any help, comments,links would be greatly apreciated. thank you in advance