I am focusing too much on how the floor drains do not line up with any orientation of that pool, I been looking at pools with that many floor drains, maybe the floor drains were just painted there for aesthetics…

Okay so, my autism is getting the better of me and I am focusing on the floor drains, I've seen these types before, instead of being flush to the tile like pool drains, or shower drains they looked more like blood/water drains from slaughter houses.

Newer slaughterhouses use slot style drains now, older ones still used the square ones typically.

The implication is that these kids are not in a pool but a slaughterhouse being hung up by their arms and drained of blood through their feet.

Maybe we are looking for an older slaughter house style instead of a pool, the floor drains for most of the pictures just does not add up.