We're getting closer to putting our 15 x 30 AG pool up and I need to decide whether to use 2" of sand on the bottom (I purchased coving) and worry about smoothing that out or just getting 1 1/2" styrofoam and laying that out. Does anyone have an opinion/experience on which is best? I'm sure the styrofoam would be easiest, but I don't want to do it if it compromises anything.

Thanks everyone.