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Fluval® G3 Tri-EX 3-in-1 cartridge is for use in the Fluval® G6 Filter. Combining the binding power of Fluval® G phosphate, nitrate and carbon, Tri-EX is an all-in-one pollution management solution for freshwater aquariums. With the continued use of Tri-EX, nitrates, phosphates and organic pollutants remain under control. The cartridge binds over 9000 mg (or more than 15 mg/L in a 600 L aquarium) of nitrate and over 1100 mg (or more than 2 mg/L in a 600 L aquarium) of phosphate. The specialized mesh size of the carbon component maximizes the surface-to-volume ratio for optimized performance.