The surface must be perfectly flat, solid and level. Pay close attention to the pool’s stability and levelness in the first stages of filling your pool up with water.
If after about an inch of water is accumulated, and the water is not spreading out evenly, or the pool appears to be bulging to one side, stop filling the pool, drain the water, and select a new level site. If the pool is set up on a slope, the pool will be lopsided and can collapse causing personal injury or property damage.