Caldera 73531 | 75 sq ft Utopia Spa Filter Brand_GLB clear water and a sanitizer

clear water and a sanitizer reserve that simply keeps working between check-ins

This does not replace the upper half of the 108725 pillow

with any sanitizer system

and chemical-resistant end caps

Caldera 73531 | 75 sq ft Utopia Spa Filter Brand_GLB clear water and a sanitizerThe Caldera 73531 filter cartridge is a factory original replacement covering a wide range of Caldera spas. With 75 square feet of filtration across 260 pleats of heavy duty polyester, it delivers more efficient filtration and better water clarity so you spend less time cleaning and more time enjoying your hot tub. Filtration is the quiet backbone of good spa water. Every soak leaves behind body oils, lotions, hair, and fine debris, and the cartridge