Tomorrow I have a contractor coming to lay out for leveling and compacting the ground for my pool. The pool instructions call for crushed rock around the basin of the pool. As well as under the pressure plates. So can I just get the crushed rock on the entire area I’m having compacted and add my 3” of sand on top of that? I would have to dig some after they lay the base to get my patio blocks and buttresses flush with the ground. Thanks in advance for any help. These instructions are about as clear as mud.