There is no one-size-fits-all answer to this question, as the best base for an above ground pool will vary depending on the local soil conditions. However, in general, it is best to set up an above ground pool on a level surface, and the most common recommendation is to put down a layer of crushed stone or gravel before installing the pool. This will create a stable foundation for the pool and help to prevent future settling or sinking.

The best base for an above ground pool is a level, flat surface. If the surface is not level, use shims to adjust the height until the surface is level. You can use a variety of materials as a base for your pool, but some materials are better than others. Concrete is the most popular material for a pool base, because it is stable and long lasting. However, concrete can be expensive and difficult to work with. Some people choose to build a wooden frame and then cover it with concrete. This option is cheaper than using concrete alone, but it may not be as sturdy or long lasting.