The Hydropool Serenity 4500 is the most popular Serenity model around the world—and for good reason. This 5-person hot tub offers the perfect balance of comfort, size, and value. It features a no-float lounger, ergonomic seating with varying seat heights, and a large entry step ideal for families with young children or anyone with mobility concerns. Standard features include elegant LED moon lighting, dual AquaBlade waterfalls, and 34 stainless steel hydrotherapy jets for a soothing and revitalizing experience.