Unicel C-4405 2-Pack | 50 sq ft Rainbow DSF Spa Filter Brand_Vermont Castings SimpliFire Electric Insert 25"

SimpliFire Electric Insert 25"

and a spa that never quite gets "clear" no matter how much chemistry you add

1 x Pizza Cutter Wheel

Filtration is what keeps spa water clear and comfortable

This product is compatible with other other chemicals commonly used to treat swimming pools and it is effective in both acid and alkaline ph ranges

Unicel C-4405 2-Pack | 50 sq ft Rainbow DSF Spa Filter Brand_Vermont Castings SimpliFire Electric Insert 25"The Unicel C 4405 is a matched pair of replacement filter cartridges delivering 50 square feet of combined filtration for Pentair Rainbow Dynamic Series IV systems and Waterway skim filters. It is sold as a set of two because the system is designed around two cartridges working side by side not because two is a convenient bulk quantity. That distinction matters more than it might sound. These housings run a pair of compact cartridges in parallel