Endless Pools E550 Swim SpaA More Expansive Swim and Exercise Experience You'll get even more room for at home, total body fitness with our newest 15' Endless Pools Fitness System. With no jetted seats and a wider exercise area, the E550 stands as the best swim spa on the market. The E550 builds upon the success of our E500. The added space optimizes the flow of water, so the E550 allows you to swim with much less turbulence than competing spas. Like the E500, the E550 features