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The Fluval A423 is a combination replacement filter for use in the following aquarium filtration system:
The Fluval A423 - G3 Tri-X Aquarium Filter Cartridge removes phosphate, nitrates, and organic waste from aquariums. This Fluval G3 replacement Controls algae flare-ups, dirty water, and low oxygen levels. This Tri-X filter Neutralizes ammonia and other animal waste. This Fluval cartridge traps ions so they can't leak back into aquarium water. This Fluval G3 filter is for freshwater aquariums.
The Fluval A423 specifications: