Remove grass and debris, then use a long level or laser level to ensure the area is flat. Spread and compact sand or a foam pad to create a smooth, even surface before installing the pool.

Use shims under the base to adjust height, then check with a level. Secure to wall studs with screws to prevent shifting.

Remove grass, use a long level and tamper, and add 1–2 inches of mason sand for a smooth, even base.