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