1 cu.ft. of Highly Activated Carbon made from Coconut Shell.
12 X 40 Mesh
NSF/ANSI Standard 61 certified.
Can be used to replace Hysulex ( Rainsoft Trade Name ) carbon.

For taste and odor removal
Wells with low level Hydrogen Sulfide odor
OR Chlorine smell in City Water Source

Clack granular activated carbon is designed for reduction of tastes, odors and dissolved organic chemicals from municipal and industrial water supplies. Manufactured in the United States from select grades of bituminous coal to produce a high density, durable granular product capable of withstanding the abrasion and dynamics associated with repeated hydraulic transport, backwashing and mechanical handling. Activation is carefully controlled to produce exceptionally high internal surface area with optimum pore size for the adsorption of a broad range of high and low molecular weight organic contaminants.

Common Amount of Carbon needed would be
1 cu.ft. for a 9 x 48 or 10 x 44 tank.
OR 1.5 cu.ft. for a 10 x 54 size tank.

Remember you'll need GRAVEL when rebedding a carbon filter tank.

INSTRUCTIONS - Replacing MEDIA ( Carbon, Greensand, Birm, Calcite, etc ),
> Other MEDIA replacement GUIDE

Also> Carbon replacement - How often should you replace the carbon in a whole house unit?