Caldera / Hot Spring 50 Sq Ft. Hot Tub Filter (Fits Cumberland, Kauai, Martinique, Hot Spot Sorrento) salt system the calcium hardness must be

the calcium hardness must be between 25-75ppm

- Conforms to irregular surfaces

Sirona Simply and ozone

The Hot Spring® Limelight Collection 75 Sq Ft

All of our Hot Spring® and Caldera Spas® filters

Caldera / Hot Spring 50 Sq Ft. Hot Tub Filter (Fits Cumberland, Kauai, Martinique, Hot Spot Sorrento) salt system the calcium hardness must beThe Caldera Hot Spring Spas 50 Sq Ft. Hot Tub Filter is used in the following hot tub models: Hot Spot Sorrento from 2003 2009 Caldera Cumberland Caldera Kauai Caldera Martinique Filter Specs: 50 Sq Ft. filtration Height: 10 3 4" Diameter: 6 3 4" Top: Semi Circular Handle Bottom Center Hole Diameter: 2 1 2" The Caldera Hot Spring Spas 50 Sq Ft. Hot Tub Filter has a life expectancy of approximately 1 year if maintained properly. All of our Hot Spring