Open Box Online Return.  May have blemishes from shipping and storage.

SHIPS SAME OR NEXT BUSINESS DAY

High Compatibility: Our aquarium filter cartridge measures 6 inches in length and 4.5 inches in width, making it a perfect fit for Top Fin PF20, PF30, PF40, and PF75 Power Filters. This cartridge ensures continuous health for your fish tank water, maintaining optimal conditions at all times. Each pack includes 15 aquarium filter cottons, allowing for replacement every 2-4 weeks.

Superior Filtration Performance: Crafted from a blend of cotton and carbon, our filter cotton boasts a 3-layer filtering system that effectively removes and absorbs up to 99% of impurities, ensuring a clean water source and promoting the healthy development of your fish.

Extended Aquarium Filter Lifespan: Through rigorous testing, our filter cotton has demonstrated its ability to handle a substantial amount of debris for up to four weeks. However, we recommend replacing it within 2-4 weeks to uphold consistent cleanliness and water health.

Effortless Installation: Simply replace the used cartridge with a new one and rinse it under cool water to eliminate any dust particles. Once rinsed, insert the cartridge into the filter chamber, guaranteeing the ongoing well-being of your fish.