In my pool career I have built, from the ground up, above ground vinyl pools, on ground vinyl pools, in ground vinyl pools, fiberglass pools and spas, gunite residential and commercial pools, portable spas as well as in ground shells. Utilizing energy efficiency since 1988 I have used 2-speed pumps on waterfalls systems as well as pools. This was borrowed technology from the portable spa industry (air switches). I have worked directly with counties throughout California and Nevada since 2007 for VGBA compliance applications and products.