Carbon Cartridges - Cascade 300 Internal Filters
- Replacement carbon cartridge for Cascade 300 series filters
- Removes water impurities, discoloration and odors from aquariums
- Carbon cartridges should be replaced every 2-3 months depending on bioload
- Includes 2 cartridges per pack
- Cartridges are refillable with Penn-Plax Pro-Carb carbon pellets