The Serenity 4300 may be the smallest hot tub in Hydropool’s lineup, but it delivers big on comfort and performance. Designed for 2 to 4 people, this compact rectangular model features 31 hydrotherapy jets, a no-float lounger, and three bucket seats—making it an ideal choice for couples while still having space for up to four. It’s a favorite for those looking to downsize, working with limited space, or shopping on a budget without sacrificing quality or relaxation.