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MATRIKX GREENBLOCK CTO 9¾" × 2¾" Carbon Block Filter for Chlorine Taste and Odor

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  Stock Item
  • Removes Chlorine, Taste & Odor
  • 5 Micron Filtration
  • Carbon Block Cartridge
  • Fits Standard 10" Housings
Filtered Water Benefits the Whole Family
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We offer housing assemblies without cartridges so you can design your own system.
Removes Chlorine


  • 5 micron nominal filtration
  • Exceptionally low pressure drop.
  • High dirt holding capacity.
  • Excellent chemical contaminant reduction.
  • High Adsorptive Capacity and Efficiency.
  • NSF and WQA certification for Material Safety.
  • California Prop. 65 compliance.
*Based on manufacturer's internal testing.

Green Advantage

KX Technologies® and Filtrex Technologies®, both Marmon Water/Berkshire Hathaway companies, have teamed up to combine the very best of their MATRIKX® and GREENBLOCK® carbon block lines, into a single world class product offering. The new and improved product line is the result of decades of experience in R&D, design, formulation, and manufacture of high-performance carbon block filters.

MATRIKX® CTO® filters, powered by GREENBLOCK®, are made from 100% coconut shell carbon, a renewable, and ecologically sustainable material. The carbon is processed into blocks using a unique binder system and proprietary manufacturing techniques to produce filters with a greater number of micro-pores and available carbon surface area, which display superior adsorption capacity and kinetic dynamics.

The companies are committed to Research and Development to advance filtration technology in an ecologically sound way.

Green Quality

MATRIKX® CTO®, powered by GREENBLOCK®, carbon block filters are:

  • Manufactured in ISO 9001 certified facilities
  • Manufactured from NSF/ANSI standard 61 certified coconut shell carbon
  • NSF/ANSI Standard 42 certified (material safety)
  • Performance validated by independent laboratories
  • Quality and performance monitored in extensive in-house laboratories