25 sq. ft. Filter Cartridge

The Unicel C-4325 filter cartridge is a compatible replacement for the Hayward CX225RE filter used in the MicroStar and MicroStar-C225 inline filter systems. It's also compatible with the Pentair Commander II inline filter system that uses the OEM 57010500 cartridge. It may also be compatible with select hot tubs. To ensure proper fitment and performance. Confirm that this filter cartridge has the exact dimensions as your old filter. Filter details: Part no: C-4325 Diameter: 4-5/8" Length: 11-7/8" Top: 2-1/16" Open Bottom: 2-1/16" Open 25 sq.ft. Filter Media: Reemay Brand: Unicel Premium Compatible replacement for the following: Pleatco PA225 Filbur FC-1220 Hayward OEM CX225RE Hayward Microstar Clear C-225 Pentair 57010500 How long should Unicel hot tub filters last? While most hot tub filters need to be changed every six to twelve months, Unicel brand filters are made with REEMAY premium trilobal filtration media that delivers 45% more surface area over standard rounded filter fibres and can last up to 18 months or more, depending on your level of hot tub use and filter cleaning routine.