This is what the "M" represents but in my opinion if the chemistry is per TFP you won't ever need it. "Microban coating"
The Hayward CX225XREM filter cartridge has a media area of 25 square feet and has Micron Technology which protects the cartridge against the growth of harmful bacteria. It is made of superior reinforced polyester pleated material with molded end caps. The precision-engineered extruded core design provides maximum water flow while reducing energy cost. And the reusable filter cartridge provides a high degree of water clarity and longer filter cycles.
Hayward filter elements are designed to meet NSF's high quality performance and durability standards with Hayward filters. Only Hayward replacement filter cartridges will provide maximum hydraulic efficiency, exceptional first pass debris removal, and extended durability. This cartridge is individually packaged with the Hayward name on end caps and plastic wrap to identify as genuine Hayward parts.
Product Features
- 25 square feet
- For Micro Star-Clear C200/C225 Series filters
- Microban coated which fights growth of microbes and increases lifespan of cartridge
- Easily traps dirt and debris.
- Reinforced Center Cores
- Reinforced antimicrobial end caps