Penn-Plax Cascade 100 Hang-On Filter Replacement Media, 3 Pack - Dual-Sided Aquarium Filter Cartridge with Activated Carbon & Poly-Fiber Floss -Easy to Install -Improves Water Clarity, 5.5x3.25x0.75In

The Penn Plax Cascade 100 GPH Filter Cartridges with Activated Carbon will improve the quality of your aquarium water and keep your fish healthy.
This 3 count of Filter Cartridge Replacements is designed to fit the Cascade 100 GPH Hang-On Power Filter and will last 6 to 12 weeks depending on the condition of your tank.
Activated carbon is great for freshwater aquarium filtration. It has the ability to not only visually clear the water; but trap pollutants in the pores of the carbon so they do not enter the water. This filter cartridge will remove ammonia; nitrites; odors and other harmful toxins from your aquarium to keep it healthy. It has a poly-fiber floss barrier which screens out particulate matter and debris for an extra layer of protection. Within 24 hours you will see a drastic difference in the water quality.
Each filter cartridge is perfectly measured to fit into the Cascade 100 Hang On Filter tray without any gaps preventing debris and contaminants from entering back into the water. This filter cartridge is suitable for both freshwater and marine environments. When used together; the Cascade 100 GPH Filter Model CPF2 and Cascade 100 Filter Cartridges (CPF2C3) provide maximum protection against water pollutants from harming your fish
This is for one package with three replacement cartridges.

Special Packs of Three Replacement Cartridges are available for the following Cascade Hang-On Power Filters:
Cascade 20 uses Replacement Model number CPF6C3 (3 cartridges)
Cascade 80 uses Replacement Model number CPF1C3 (3 cartridges)
Cascade 100 uses Replacement Model number CPF2C3 (3 cartridges)
Cascade 150 uses Replacement Model number CPF34C3 (3 cartridges)
Cascade 200 uses Replacement Model number CPF34C3 (3 cartridges)
Cascade 300 uses Replacement Model number CPF5C3 (3 cartridges)