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Home > Aquarium Supplies > Filters & Filter Media > Shop All Filters & Filter Media > Fluval FX4 High Performance Canister Filter
Fluval FX4 High Performance Canister Filter
Fluval FX4 High Performance Canister Filter
Fluval FX4 High Performance Canister Filter
Additional sizes may be available!
Additional sizes may be available!
Product Notes:
· We cannot ship this product to Alaska.

Please Note: Return of electrical equipment for exchange or store credit is limited to 30 days from the date of purchase. Beyond 30 days, please contact the manufacturer for repair or replacement as covered by the manufacturer's warranty.

Returned products must be unopened and in the original packaging to receive full store credit. Products that have been opened, used, or lightly used, will incur a 15% processing fee. Upon receipt of the returned product, store credit will be applied, minus the processing fee.

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*700 gph large capacity canister filter for aquariums up to 250 gallons
*Smart multistage filtration maintains superior aquarium water quality
*Smart technology automates start up &monitors pump performance

Smart filtration that's not too big and not too small - just right for aquariums up to 250 gallons. Fluval FX4 High Performance Canister Filter hits the "goldilocks zone" of larger aquarium filtration by bridging the gap between the Fluval 406 Multi-Stage Canister Filter and the Fluval FX6 High Performance Canister Filter. Large capacity filter pairs quiet, energy-efficient operation with smart reliable performance for superior filtration achieved with minimal effort.

Fluval FX4 High Performance Canister Filter makes aquarium fishkeeping easier and more convenient thanks to Smart Pump technology. Advanced microchip technology continuously monitors and optimized pump performance while utilizing no more than 30 watts of power. Self-priming unit makes start up a breeze and includes all filter media for convenient use right out of the box. For freshwater or marine aquariums up to 250 gallons.

Key Features
  • Multi-stage filter pumps out 700 gallons of water per hour
  • Smart Pump advanced microchip technology continuously monitors and optimizes pump performance
  • Self-starting – just add water, plug in and Smart Pump will take over. Trapped air auto-evacuated every 12 hours to ensure maximum efficiency
  • Easy water changes eliminate need to carry buckets of water. Simply attach hosing to the output (kit sold separately), Smart Pump does the rest
  • Removable, stackable media baskets eliminate water bypass
  • All filter media included - mechanical, chemical and biological
  • Aqua-Stop valves with leak-proof Click-Fit attachment system
  • Valves positioned at a convenient 45-degree angles for easy installation and rotation
  • Anti-clog telescopic strainer ensures continuous flow
  • Multi-directional output nozzles can be fully adjusted to create custom water flow
  • Utility Valve with drain hose for easy maintenance and flushing of canister
  • Rubberized feet help ensure quiet operation
  • Compact 16-1/2" tall design - easily fits under most aquariums
  • Made in Italy
  • Three-year warranty
  • For freshwater and saltwater aquariums up to 250 gallons

What's Included
Ribbed Hosing, Rim Connectors, Clips and Suction Cups, Intake Stem, Output Nozzle, Lid Fasteners, Filter Canister, Utility Valve and Hosing, Drain Cap, Pump Unit (Motor) and Power Cord, Rubber Feet, Media Baskets, 1/2 Media Baskets, Filter Lid and Accessories.

Maintenance Tips
To ensure optimal and proper functioning of your Fluval FX External Filter, regular maintenance is required. Failure to do so may result in the failure of the filter and will invalidate your warranty. Additionally, regular cleaning and maintenance will greatly reduce or completely prevent faults and reduction in performance. Please refer to the maintenance schedule below.

Maintenance Frequency Chart
Components Monthly Every Three Months Every Six Months Yearly
Magnetic Impeller   Check & Clean   Replace
Motor Seal Ring   Check & Clean   Replace
Intake Stem/Strainer   Check & Clean    
Ribbed Hosing     Check & Clean  
Mechanical Foam Check & Clean    Replace Half Quantity  
Bio-Foam   Check & Clean Replace  
BIOMAX Rinse   Replace Half Quantity  
Carbon Pad Replace      
Canister (inside)* Check & Clean      

* IMPORTANT: If you have not done regular maintenance of the inside of the canister as recommended by the maintenance frequency chart, some particles may get flushed back into the aquarium.

About Fluval
What Makes Fluval So Trusted?
Fluval is a world leader in quality aquatic products. Fish-hobbyists everywhere have depended on Fluval's reliable technology and great design for over 35 years.

Fluval has built its reputation by developing technically advanced, innovative products that are easy to use, durable, and convenient. Without Fluval innovations the world's aquariums would be far less inspiring.

Fluval's pioneering spirit and commitment to technology and design are also reflected in its wide product range, from the technically advanced Fluval G Series Filters to stylish yet practical aquariums, including Fluval Edge, Chi, Profile, and Studio.

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