There you have 15 meters converted to centimeters. But I doubt that there's a swimming pool anywhere that's 15 meters deep at either end.
15 meters is a smidgen more than 49 feet. That's like eight 6-ft people all standing on shoulders to reach from the bottom to the surface. It's dangerous, and it's a huge expense for heating and chlorine tablets, for so much water in which hardly anybody will ever go halfway to the bottom.
