Unicel C-4335 | 35 sq ft Spa Filter Cartridge Brand_Big Green Egg 5 lb container is the

5 lb container is the better per-pound value

Less chlorine

For 20" x 11" opening or larger

1 x Crossfire Tree-Style CFBT290 Burner

Using spa test strips

Unicel C-4335 | 35 sq ft Spa Filter Cartridge Brand_Big Green Egg 5 lb container is theThe Unicel C 4335 delivers 35 square feet of filtration across 219 pleats of Reemay polyester media, capturing debris down to an average of 20 microns. Built to meet or exceed OEM specifications, it's one of the most widely compatible cartridges in the spa industry fitting systems from Bullfrog, Caldera, Sundance, Waterway, Pentair, Rainbow, and many more. Filtration is the quiet backbone of clean spa water. Every soak leaves behind body oils,