Caldera 31489 | 30 sq ft Spa Filter Cartridge Brand_Pool Marvel or on any surface where

or on any surface where dissolved metals such as iron

Enabled with GMG RACKT™ technology

Type: Normally Open

It's one of the easiest upgrades you can make to your maintenance routine: just drop it in and let it work

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Caldera 31489 | 30 sq ft Spa Filter Cartridge Brand_Pool Marvel or on any surface whereThe Caldera 31489 filter cartridge delivers 30 square feet of pleated filtration for cleaner, clearer spa water. It's one of the most widely compatible cartridges in the Watkins family of spa brands, serving a broad range of models across decades of production so it's a dependable replacement to keep on hand. Filtration is the quiet backbone of good spa water. Every soak leaves behind body oils, lotions, hair, and fine debris, and the cartridge is