Aqueon Replacement QuietFlow Internal Filter Cartridges [Aquarium Filter Cartridges, Aquarium Supplies] Large - 12 count (6 x 2 ct)

Aqueon Replacement Filter Cartridges for QuietFlow Internal Power Filters feature a patented, dual-sided dense-floss design and contain over 25% more activated carbon than competing brands. These cartridges provide even carbon distribution for more thorough filtration and longer effectiveness. * Activated carbon and foam filter cartridges for QuietFlow Internal Power Filters * Pre-assembled and ready to use * Provides highly efficient mechanical and chemical filtration Directions: For optimal performance and crystal clear water, change cartridge approximately 30 days. Specifications: Small: For QuietFlow models AT10 and AT15 3.38"L x 1.38"W x 5.75"H Large: For QuietFlow models AT30 and AT40 4.5"L x 2"W x 5.75"H