NPT StoneScapes® Regular Pebbles AQUA COOL REGULAR 1/2 Aqua Cool Pool Finish .5 Parent Kit. StoneScapes Regular Aqua Cool pool finish creates light blue water color and is comprised of white Portland cement and features natural white quartz pebble aggregates and Cobalt Blue colored quartz highlights. The beauty of this finish comes from the shade and color variations inherent in natural materials.