How much bluestone gravel should be placed at the deep end of a pool when water is found? By accident the backhoe unplugged the pump at about 5 pm last night. The builder put a bit of bluestone in the bottom, but the water rose because the pump was off for 14 hours. The stone now looks muddy and the builder is continuing to frame out the pool. Is this a problem? How much bluestone should be placed? Any thoughts are appreciated.