US Patent 7797770 Portable spa

A spa pool assembly has a pool having an enclosing wall and a base that together defines an interior. The base has a plurality of inflatable sections that are divided by a plurality of air passages that includes a first air passage that has a plurality of small bubble openings, and a second air passage that has a plurality of large bubble openings. The small bubble openings eject bubbles that are smaller in size than the bubbles ejected from the large bubble openings. The spa pool assembly can also include a bubble controller that controls the ejection of bubbles from the small bubble openings and the large bubble openings.