The ACE Salt Water System from Hot Spring Spas is the easy way to keep your spa water looking, feeling, and smelling great. ACE is an option for al Hot Spring Highlife, Highlife NXT and Limelight Collection spas. Have questions about using the ACE salt water system with your Hot Spring Spa? Call 914-237-5606 to speak with a customer service specialist. We offer FREE SHIPPING to the lower 48 states on orders over $299.