The Fluval FX4 High Performance Canister Filter also provides a much higher flow rate when compared against the Fluval 407 Performance Canister Filter. The maximum pump output for the FX4 is 700 gallons per hour. This is 82.77% more than the 407, which is capable of 383 gallons per hour. When it comes to liters, the FX4 can output 2,650 gallons.
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