These large replacement filter cartridges are designed for use with the Aqueon QuietFlow AT30 and AT40 Internal Power Filters. They provide your system with powerful 3-stage filtration. The result is healthy, crystal clear water for the inhabitants of your aquarium or terrarium. Replace filter cartridges every 30 days or as needed to ensure optimal performance.
Stage 1 – Mechanical Filtration: Dense mechanical foam effectively traps debris and particulate matter.
Stage 2 – Chemical Filtration: Premium activated carbon removes toxins, odors, and discoloration.
Stage 3 – Biological Filtration: Patented Bio-Grid facilitates cultivation of beneficial bacteria to remove toxic ammonia and nitrites.