The backfill material is a dry mix of cement-stabilised sand. Dpending on where this is sourced the ratio of sand to cement varies. Consult the in ground install guide or engneering documentaion for specifics.
Are there any specific guidelines for pool fencing in my area?
Yes, all states and territories in Australia have specific guidelines for pool fencing, typically based on the Australian Standard AS1926.1-2012. It is essential to check