The Catalytic Granular Activated Carbon Cartridges are more effective than standard granular activated carbon and carbon block cartridges and is specialized at removing Hydrogen Sulfide, VOCs and Chloramines. If the influent dissolved oxygen content is less than 4mg/L, an air injector may be required. This black granular media should be pre-wetted for at least twelve hours prior to use. Removes/Reduces: Hydrogen Sulfide(rotten egg smell) Chloramine Removal Hydrogen Peroxide (H2O2) MTHB VOCs - volatile organic chemicals Pesticides Herbicides Chlorine Bad Tastes Odors Specifications: Micron Rating: 10 Nominal Dimensions: 10" x 4.5" Total Weight: 3 lbs Operation Temperature: 40F to 100F Max Recommended Flow Rate: 0.2 GPM Recommended Dissolved Oxygen content: 4 mg/L Filter Media: Catalytic Granular Activated Carbon Filter Life: 3,500 Gallons IPW Model #: IF-SM-CB010B