Caldera Hot Tub Filter Cartridge 50sqft

This 50sqft Caldera Hot Tub Cartridge is primarily used on the Caldera Martinique and Kauai spa models.

It measures 11″ long with a 7 ” diameter it as a 2 1/2″ bottom opening.

You should change your Caldera hot tub filter cartridge once a year and rinse it once a month.