The AC Series takes power filtration to the next level. Built on a best-selling platform with a 40-year reputation for exceptional quality, reliability, and convenience, this series has become a standout choice that aquarium enthusiasts know and trust. Along with its proven multi-stage cleaning, CycleGuard beneficial bacteria support, and patented refiltration system, the latest clip-on generation sets a new standard for cleaning performance, media efficiency, quiet operation, and durability with several notable upgrades. Experience the unmatched cleaning power of Fluval AC Series!

- CycleGuard preserves the biological balance of your aquarium through independent media replacement, which avoids disrupting the nitrogen cycle and is essential for maintaining clean and healthy water

- Patented refiltration system prolongs media contact time for a cleaner, healthier and more biologically stable aquarium

- Direct access to chemical media - no need to remove basket from filter (less mess)

- Pre-filter intake strainer keeps algae filaments and debris away from pump for consistent water flow

- High-porosity 30PPI mechanical foam for improved filtering capability

- Adjustable flow control for precise adjustment

- Quick and easy maintenance - reconfigured media basket design offers a dedicated space for each cleaning stage, allowing for faster and simpler changes