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Filter Accessories
  1. Home
  2. Pet Supplies
  3. Fish & Aquatic Pets
  4. Aquarium Accessories
  5. Aquarium Pumps & Filters
  6. Filter Accessories
  7. Fluval U4 Underwater…
Fluval

Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration

Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration - main product image
All-inclusive price — duties & taxes paid, no customs charges at delivery
₹13,590₹21,580

You save ₹7,990 (37%)

Qty
Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration — Black / U2
Black / U2
₹9,000
₹13,840
In Stock
Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration — Black / U3
Black / U3
₹13,260
₹14,390
In Stock
Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration — Black / U4
Black / U4
₹13,590
₹21,580
In Stock
Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration — 블랙. / U4
블랙. / U4
₹2,44,950
₹3,44,060
In Stock

Estimated doorstep delivery by 26 Nov - 28 Nov from USA

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All Duties Included
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High-Quality Aquarium Filtration at a Competitive Price

About this item

Fluval U4 Underwater Filter is a versatile aquarium and reptile filter, supporting freshwater, marine, and low water level tanks. Its three-stage filtration includes foam for debris, poly/carbon cartridge for clarity, and BioMax for biological filtration, ensuring optimal water quality. The sleek design features flip-top access for quick cartridge changes, and the filter can be positioned horizontally or vertically to suit tank shape or create currents. Since 1975, Fluval has pioneered 3-stage filters with innovative technology, inspiring aquarists of all skill levels to enjoy and respect aquatic life.

Designed for tanks up to 65 gallons, the U4 filter's biological and mechanical stages help maintain healthy water conditions, reducing maintenance time. Imported directly from the USA, it arrives with all duties paid, ensuring hassle-free setup and ongoing use. Its durable metal construction and advanced flow control make it a reliable choice for hobbyists seeking quality filtration.

In India, this filter offers a high-performance solution for small to large aquariums and reptile tanks. Its 230V compatibility and compact size fit well into Indian setups, with quick delivery via ExpressBox. Compared to local filters, Fluval U4 provides superior biological filtration, helping maintain clear water and healthy fish or reptiles, at a competitive price point.

Key Features

  • Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums
  • Sleek design with easy grip water control panel and redesigned media cartridge to trap more debris
  • Convenient flip-top lid allows for quick and easy access to filter cartridge for maintenance or replacement
  • Position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature or vertically against aquarium wall to create currents or customized flow patterns
  • Designed for freshwater, saltwater and reptile environments up to 65 gallons

Why choose this product

Advanced Three-Stage Filtration

Fluval U4's three-stage filtration with BioMax ensures superior water quality by removing debris, impurities, and supporting beneficial bacteria. Its innovative design has set industry standards since 1975, making it a trusted choice for aquarists in India seeking reliable, high-quality filtration.

Ideal for Diverse Environments & Skill Levels

Suitable for freshwater, saltwater, and reptiles up to 65 gallons, the U4 filter is easy to install and maintain. Its flexible positioning and quiet operation make it perfect for beginners and experienced hobbyists alike, imported directly from the USA with all duties paid for hassle-free use in India.

How to use

  • Install the filter — Place the filter in the desired position—horizontal or vertical—ensure the power cord is connected to a 230V socket in India.
  • Prime and start — Fill the filter with tank water, switch on, and adjust flow control to desired current. Check for leaks and proper operation.
  • Maintain regularly — Replace cartridges via flip-top lid every 4-6 weeks, clean foam and BioMax media as needed, and monitor water clarity.

Example scenarios

Typical situations where Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration helps — illustrative scenarios, not customer reviews.

1
Scenario 1
Illustrative example
Where it helps

Ravi from Mumbai has a 50-gallon freshwater tank, needs reliable filtration to reduce maintenance and ensure water clarity.

How this product helps

Fluval U4 supports his tank with 240L/hr flow, biological and mechanical stages, arriving in 4-6 days, imported from USA, duties paid, easy cartridge change.

Technical specifications

Setup & usage

Recommended Tank SizeUp to 65 gallons
ReplacementsCartridge flip-top for quick access
Flow ControlThree-way adjustable
Cost per use₹56.63 per liter
Shelf LifeFactory-sealed on arrival, check manufacturer's date
ReapplicationN/A
ContraindicationsNone
Allergens / IrritantsNone

Warranty

CrowCrowCrow helps you bring this product to India. Any warranty is offered by Fluvalunder its own policy.

Read more

How we compare

FeatureFluval U4 UnderwaterOthers
Flow Rate1000 liters/hour (264 GPH) for up to 65 gallonsTypically 500-800 liters/hour, suitable for smaller tanks
Filtration StagesThree-stage: foam, poly/carbon, BioMaxUsually two-stage: foam and sponge, less comprehensive
Material & DurabilityMetal construction for longevityPlastic units with shorter lifespan
Price per Liter₹56.63 per literVaries, generally ₹300-₹500 per 240L capacity

Product details

SKUxay2322
GTIN00015561104807
BrandFluval
ModelHAGEN FLUVAL U4 UNDERWATER FILTER
SizeU4
ColorBlack
Capacity240 liters (63.4 gallons)

About Fluval

Fluval, established in 1975, pioneered 3-stage aquarium filtration technology, setting industry standards worldwide and inspiring aquarists of all skill levels.

Compliance & Legal

This is a dietary supplement; not intended to diagnose, treat, cure or prevent any disease.

Customer Reviews

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FAQ, See What Others Asked

What size aquarium filter should I choose for my tank?
Match the filter's flow rate to your tank volume. The Fluval U4 supports tanks up to 65 gallons with 240 liters/hr, suitable for most home aquariums. For heavily stocked tanks, consider larger models or supplementary filtration.
What is the difference between mechanical, biological, and chemical filtration in these units?
Mechanical filtration traps debris with foam, biological filtration uses BioMax media for beneficial bacteria, and chemical filtration employs poly/carbon cartridges to remove impurities and odors. The U4 combines all three for comprehensive water quality.
Is this filter safe for freshwater and saltwater tanks?
Yes, the Fluval U4 is designed for both freshwater and saltwater environments, supporting healthy aquatic life with its three-stage filtration system. It is imported directly from the USA, ensuring quality and reliability.
How easy is it to maintain and replace the filter cartridges?
The flip-top lid allows quick access for cartridge replacement, minimizing disturbance. Regular maintenance ensures optimal performance, with cartridges readily available online or in pet stores in India.
Can I position this filter vertically or horizontally?
Yes, the U4 filter can be positioned horizontally for shallow tanks or waterfalls, and vertically against the wall to create currents, offering flexible setup options for Indian aquariums.
How long does the filter last before needing replacement?
With proper maintenance, the filter's components last several years. Cartridge replacement frequency depends on tank load, typically every 4-6 weeks for optimal water clarity.

Frequently bought together

Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration

This item:

Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration

₹13,590

Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration

This item

Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration

₹13,590

Total price:

₹18,170

You save ₹9,070 (33%) Extra

3 items selected

3 items

₹18,170

You save ₹9,070 (33%) Extra

Product Comparison

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Fluval U4 Underwater Filter 230V | 240L/hr Biological & Mechanical Filtration
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Spec
Price
₹13,590
₹21,580
₹2,470
₹3,340
₹2,110
₹2,320
₹3,210
₹4,450
₹3,200
₹4,750
₹5,680
₹9,100
₹1,840
₹2,170
Brand NameFluvalhyggerhyggerTetraAQUA-TECHPenn-PlaxDogline
SourceUS RetailUS RetailUS RetailUS RetailUS RetailUS RetailUS Retail
Sold ByCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrow
Imported from USA
₹13,590₹21,580

You Save ₹7,990

Estimated doorstep delivery by 26 Nov - 28 Nov from USA
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Your Order Journey: From Purchase to Doorstep

You Order
Place your order
USA Warehouse dispatch
Packed & shipped
International Air Shipping
Fast transit
Consignment to India Warehouse
Customs cleared
Doorstep delivery
Delivered to you
You Order
Place your order
USA Warehouse dispatch
Packed & shipped
International Air Shipping
Fast transit
Consignment to India Warehouse
Customs cleared
Doorstep delivery
Delivered to you

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₹40,770+ (3× the price)
₹13,590 locked, all-in
Hard to get the original US version in India
Original US version, shipped to your door
Extra pay for Import Duties, GST, and forex fees
One price in INR, no customs charges at delivery
4–12 weeks · No tracking
11-13 days · live tracking
Grey market, no guarantee, no protection, no refund
Sourced from US retailers, India-verified, return available
Lost in transit = ₹0 back
Full protection included