There are five models of Michael Phelps Swim Spa by Master Spas distributed by Premium Wholesale in the market today. Check out these models so you can decide which one is suited for you and your family’s needs. All models are sleek and are low-maintenance. The European-inspired designs allow for smoother swimming experience unique to Michael Phelps Swim Spas. Choose any of the five models and enjoy an energy efficient swim spa; each model only needs 50amp of electrical service.