Im curious on everyone's thoughts about using one or the other for a backfill of either a fiberglass or vinyl lined pool. It seems that many installers use Sand to compact and backfill, while others swear by gravel or even 3/4, 3/8 QP stone and condemn sand.
And even many other pool builders just throw the dirt they removed back in as backfill.
Can any professionals shed light on the proper, most superior way to backfill either type of pool and explain why that was is the best?
Im a bit surprised there are this many standards out there with a process that is so critical to a pool and decking's foundation.