Aqueon Replacement Filter Cartridges Large (3 Pack) are ready-to-use, preassembled filter cartridges that install in seconds and help create crystal-clear, healthy water for your aquarium. Patented dual-sided replaceable dense-floss cartridges filter out more particles and debris Cartridges contain more activated carbon to remove toxic impurities, odors and discoloration For use with fresh or saltwater aquariums Replacement cartridges for Aqueon Power Filters 20, 30 & 55 For best results replace cartridge every 4-6 weeks Contains 3 Cartridges.
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