Fluval FX4 Filter

# Fluval FX4 High-Performance Canister Filter
**The Compact Heavyweight of Premium Aquarium Filtration**
Engineered for aquariums up to 250 gallons, the Fluval FX4 bridges the gap between the FX6 and smaller canister filters, delivering elite multi-stage filtration in a space-saving design. Powered by Fluval’s legendary Smart Pump™ technology, this workhorse circulates an incredible 450 gallons of water per hour to maintain pristine, crystal-clear water quality for both freshwater and marine environments.
Whether you run a high-bioload African Cichlid setup, a heavily stocked predator tank, or a pristine marine aquascape, the FX4 provides the ultimate peace of mind.
### Key Features:
* **Smart Pump™ Technology:** An advanced internal microchip continuously monitors and optimizes pump performance. It automatically self-starts upon installation—just add water and plug it in. The pump also pauses every 12 hours to evacuate trapped air, ensuring maximum operating efficiency.
* **Multi-Stage Filtration Mastery:** Stacked with removable media baskets, the FX4 allows for precise customization of mechanical, chemical, and biological media. The baskets are engineered to eliminate water bypass, ensuring every drop passes through all filtration stages.
* **AquaStop Valves with Click-Fit:** Maintenance is completely hassle-free. The heavy-duty AquaStop valves feature a leak-proof, click-fit design, allowing you to regulate water flow or completely disconnect the hoses without disrupting your setup or causing spills.
* **Utility Valve & Utility Hose:** Simplifies water changes and tank maintenance. The integrated bottom drain valve allows you to empty the canister or attach a hose directly to pump water out of the aquarium during water changes.
* **Quiet & Energy Efficient:** Designed with precision-molded components and vibration-dampening rubber feet, the FX4 operates with an incredibly quiet footprint while consuming minimal energy.
### What’s Included:
* Fluval FX4 Canister Filter
* Ribbed hosing (approx. 11.4 ft / 3.5 m)
* All necessary filtration media (Fluval Foam Pads, Bio-Foam, Biomax, and Carbon Foam)
* AquaStop valves, rim attachments, intake stem, and output nozzle
* Instruction manual
### Technical Specifications:
* **Aquarium Capacity:** Up to 250 US Gallons (1,000 Liters)
* **Pump Output:** 700 GPH (2,650 L/h)
* **Filter Circulation:** 450 GPH (1,700 L/h)
* **Head Height (Max):** 10.8 ft (3.3 m)
* **Filter Volume:** 3.7 Gallons (14 Liters)
* **Biological Basket Capacity:** 1 Gallon (3.9 Liters)
* **Wattage (120V/60Hz):** 30 Watts
* **Dimensions (L x W x H):** 15.6" x 15.6" x 17.7" (40 x 40 x 45 cm)
* **Compatibility:** Freshwater and Saltwater / Marine Aquariums
### SEO Meta Description (For Shopify Search Optimization):
Shop the Fluval FX4 High-Performance Canister Filter for aquariums up to 250 gallons. Features Smart Pump™ technology, multi-stage filtration, and a 450 GPH flow rate. Fast shipping and authorized dealer support.