Horizon Series by Filbur

Premium replacement cartridge filter delivering 10 square feet of filtration surface area for superior spa water clarity. This compact filter measures 4 inches in height with a 4-1/4 inch outer...

Premium replacement cartridge designed for front-loading skim filtration systems. This 25 square foot spa filter features string height pleating with precise dimensions: 2-1/8 inch open bottom...

Genuine replacement 30 square foot filter cartridge engineered for Hot Spring spas manufactured by Watkins after 1990. This premium filtration cartridge measures 6 inches in outside diameter and...

Replacement spa filter cartridge measuring 8" in length by 4-1/4" in diameter, featuring 1 15/16" open holes at both top and bottom. This 5 square foot filtration cartridge fits various portable spa...

Premium 50 Square Foot Replacement Filter Cartridge for Caldera Hot Tubs by WatkinsThis high-performance filter cartridge delivers reliable filtration for select Caldera spa models manufactured by...

This 50 square foot replacement filter cartridge is designed for front-loading skim filter systems. Features string wound height construction with a 2-1/8 inch open bottom diameter, 5-11/16 inch...