The Fluval A20110 (often listed as A-20110) is a genuine replacement impeller assembly designed for older-generation Fluval 104 and 204 external canister filters. It features curved blades and a magnetic drive that pushes water through the filtration system.

Over time, the magnet on a filter impeller can degrade or the shaft can snap, leading to a noisy filter or a total drop in water flow. Replacing the impeller is a quick way to restore the original performance and flow rate of your 104 or 204 filter.

Key Details

• Compatibility: Fluval 104 and 204 canister filters.
• Part Type: Magnetic impeller with curved blades.
• Function: Pushes water continuously through the filter media and back into your aquarium.
• Replacement frequency: Generally only needs replacement if the magnet swells, cracks, or loses its magnetic strength, or if the blades break.