Do you notice a difference in how the sand looks & feels? I'm guessing the Reptisand is a finer & more premium grade of sand, & that "play sand" is a bit coarser?

"Play sand", after all, is meant for filling sandboxes for children to play in, & people would go broke buying little bags of Reptisand for those purposes. I notice that "play sand" carries a California Prop. 65 warning (for health hazards), I assume for silica dust- but I'm not sure about Reptisand? Maybe it's not labeled with a Prop 65 warning because it's not for human use, but humans would still be exposed to it anyway, when using it for their pets?