Unicel C-8465 | 65 sq ft Hot Spring Spa Filter Type_Igniters Sodium Borate

Sodium Borate

and total hardness with a single dip

where this one is 8 inches with a semi-circular handle and a 1-1/2 inch thread

Sundance models dated prior to 2006 contain a core block or plug in the filter assembly

Unicel C-8465 | 65 sq ft Hot Spring Spa Filter Type_Igniters Sodium BorateThe Unicel C 8465 delivers 65 square feet of filtration across 234 uniform pleats, capturing debris and particles down to an average of 20 microns. Built to meet or exceed OEM specifications, it's a direct replacement for a wide range of Hot Spring, Caldera, and Tiger River cartridges. Filtration is the quiet backbone of clean spa water. Every soak leaves behind body oils, lotions, hair, and fine debris, and the cartridge is what removes all of it