MATRIKX + CR1 is the most effective filter available for the combined reduction of cysts and control of large volumes and concentrations of chlorine taste and odor. Manufactured using a patented, solid-state extrusion process, the MATRIKX + CR1 meets NSF/ANSI Standard 53, Turbidity and Cyst Reduction, including Cryptosporidium, Giardia, Entamoeba and Toxoplasma. Made of Genuine MATRIKX Extruded Carbon, the MATRIKX + CR1 is a rigid, carbon block composite designed to deliver chlorine taste and odor reduction at >99% @ 2.5 GPM for 10,000 gallons. The MATRIKX + CR1 is ideal for use in food service applications.