National Geographic, Polishing Aquarium Cartridge size: 3 Count
The National Geographic Polishing Cartridge is a fine filter cartridge that traps small and large aquarium debris for clear water. Help maintain a healthy aquarium by changing the filter cartridge every 3-4 weeks. Features: For use with PF20, PF30, PF50 Power Filters Includes: 3 - Polishing Cartridge Water Type: Fresh water Dimensions: 6.75 in L x 2.75 in W x 0.5 in H Color: White Caution: This is not a toy. Keep out of reach of children. To avoid injury, follow the safety instructions in the enclosed instruction guide. Size: 3 Count.
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