Hot Spring® Hot Spot Collection Pillow / Headrest (Fits Tempo, Relay, Rhythm, SX, TX 2011-2019) drink tray Sirona™ Calcium Booster is compatible

Sirona™ Calcium Booster is compatible with almost all hot tub sanitization systems such as silver ion/granulated chlorine systems

Hydropool Part # 4520008

Center Hole Diameter: 3 1/2"

~ only 1 left as of 2/17/26 ~

with a finer pleat count for better water filtration

Hot Spring® Hot Spot Collection Pillow / Headrest (Fits Tempo, Relay, Rhythm, SX, TX 2011-2019) drink tray Sirona™ Calcium Booster is compatibleThe Hot Spring Hot Spot Collection Pillow Headrest fits the following Hot Spot Collection models: Tempo 2015 2109 Relay 2015 2019 Rhythm 2015 2019 SX 2011 2019 TX 2011 2019 Color: Light Gray All of our Hot Spring Hot Spot Collection filters, headrests and parts are OEM and come directly from Watkins, who is the manufacturer of Hot Spring.