This 15″ 75sqft hot tub filter cartridge is a genuine replacement part for Caldera Paradise Series spas. If you have a Caldera Salina, Makena this is the correct cartridge for you.
This hot tub cartridge measures 15″ long by 7″ in diameter with a 2″ bottom opening and closed handle top.
You should change your Caldera hot tub filter cartridge once a year and rinse it once a month.