Caldera Spa and Hot Tub Filters made by Pleatco and treated with Reemay. Spa Filters to fit Caldera Spas 33016, 033016, 1019401, 33017, 033017, 1019301 Replaces Unicel Numbers: C-7451, C-7350, C-7479, C-7375, C7451, C7350, C7479, C7375 Caldera Spa and Hot Tub Filter Cartridge 33016 UNICEL C-7451 PLEATCO PCD50 FILBUR FC-3084 - $25.32 Each When you buy 6 Filters $32.99, 2/$54.29, 6/$151.91 Caldera Spa and Hot Tub Filter Cartridge 1019401 UNICEL C-7350 PLEATCO PCD50N FILBUR FC-3963 - $25.47 Each When you buy 6 Filters $33.99, 2/$55.36, 6/$152.79 Caldera Spa and Hot Tub Filter Cartridge 33017 UNICEL C-7479 PLEATCO PCD75 FILBUR FC-3085 - $36.49 Each When you buy 6 Filters $46.99, 2/$79.54, 6/$218.95 Caldera Spa and Hot Tub Filter Cartridge 1019301 UNICEL C-7375 PLEATCO PCD75-N FILBUR FC-3964 - $37.20 Each When you buy 6 Filters $49.99, 2/$81.11, 6/$223.18 Search Here: E-mail Us Privacy Policy Shipping Rates View Cart