Fluval U3 Underwater Filter
Fluval U3 Underwater Filter
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Product Description
Product Description
Fluval U3 Underwater Filter
The Fluval U3 Underwater Filter is an internal aquarium filter for aquariums up to 40 US gallons / 150 L, offering 3-stage filtration, adjustable flow direction, and in-tank water movement for freshwater, saltwater, or compatible reptile setups.
Internal Filtration for Medium Aquariums
The U3 is designed for aquariums that need more internal filtration capacity than the U2 while still keeping setup simple and self-contained. It works well where external filtration cannot be installed, where supplemental circulation is needed, or where a fully submersible filter is preferred for a clean and compact installation.
Fluval U3 Water Movement and Media Features
- 3-stage filtration supports mechanical debris capture, chemical filtration, and biological stability.
- Foam pads remove larger particles before water passes through the central media chamber.
- Poly/carbon pads help trap fine debris, reduce odours, and improve water clarity.
- BIOMAX media provides biological surface area for beneficial bacteria.
- Adjustable 3-way flow control allows top output, integrated spray bar output, or bottom output depending on aquarium needs.
- Flip-top lid gives quick access to media for cleaning and replacement without removing the full filter body.
- Vertical mounting creates current and circulation along the aquarium wall.
- Horizontal placement can be useful in shallow tanks, low-water setups, or decorative water movement applications.
Fluval U3 Underwater Filter Specifications
- Item number: A475
- UPC: 015561104753
- Aquarium capacity: up to 40 US gal / 150 L
- Pump output: 155 US GPH / 600 LPH
- Wattage: 6W at 120 V / 60 Hz
- Dimensions: 10.5 in L x 3.25 in W x 4 in H / 27 x 8 x 10 cm
- Filter type: fully submersible internal aquarium filter
- Filtration stages: mechanical, chemical, and biological
- Mounting options: vertical or horizontal in compatible aquarium setups
U3 Filter Application Notes
The U3 is a practical primary filter for aquariums within its rated capacity or a supplemental filter for larger systems that need extra water movement. It is especially useful when the aquarium needs internal circulation, quick media access, and adjustable output without external tubing or cabinet-mounted equipment.
Official Fluval U Series Video
Setting Up the Fluval U3 Underwater Filter
Rinse the supplied media, place it in the correct chambers, mount the filter securely inside the aquarium, and choose the outlet mode that best suits the tank. Keep the unit fully submerged during operation and rinse mechanical media regularly to maintain strong flow.
What’s Included
- Fluval U3 Underwater Filter
- 2 foam filter pads
- 2 poly/carbon pads
- BIOMAX biological media
Shipping Info
Shipping Info
FREE SHIPPING OVER $119!*
- does not apply to livestock -
$11.99 FLAT RATE FOR LESS THAN $119.00 - CANADA WIDE!
*EXCEPTIONS:
- Any heavy or bulky items will incur a 100% charge of the actual shipping cost (valid for both Canada and the US). Heavy bulky items include (but are not limited to): salt, dry rock, sand, chillers, sumps, aquariums, stands, and some filter media.
- Frozen or perishable food can only be shipped via UPS Express. We have discounted the express shipping of these items to help the hobbyist out.
- Livestock is covered by a different shipping policy. To view the policy and further information regarding shipping livestock, click here.
GENERAL NOTES:
- We always make our best effort to ship your order via the carrier chosen during the check-out process; however, for some multi-piece shipments and/or remote destinations, we must reserve the right to use another carrier at our discretion (and without prior notice). If you require notice of any changes made to the carrier, please mention it in the special instructions during check-out.
- Upon request, we will ship your dry goods as per your specifications (courier, airlines, on your account, etc.).
- Quoted rates are the carriers live discounted shipping rates after adjusting for any/all shipping promotions.
Returns / Exchanges
Returns / Exchanges
Return Policy — Aquarium Equipment & Supplies
- All returns and/or exchanges must be made within 30 days of receipt of product.
- Before returning or exchanging any goods, you must contact J&L Aquatics to obtain a Return Merchandise Authorization (RMA). Items returned without prior authorization will be declined.
- Returned items must be unused, in original packaging, in as-new condition, and in perfect sellable condition. All returns are subject to inspection upon receipt.
- A 15% restocking fee applies to all online returns. This fee includes the cost of outbound shipping.
- Customer is responsible for return shipping costs on standard returns.
- Order cancellations made before shipping are not subject to a restocking fee.
Non-Returnable Items
- Special order items
- Clearance / final sale items
- Open box items
Regular sale items (non-clearance) are returnable within the 30-day return window, subject to our standard return conditions.
Defective, Warranty & DOA Items
- If you receive an item that is defective, not working, or dead on arrival (DOA), please contact us as soon as possible.
- Confirmed defective and warranty returns have no restocking fee and no Affirm fee. Customer does not pay return shipping — J&L Aquatics will provide a prepaid return label.
- All defective claims are subject to inspection. Items showing signs of customer damage, improper installation, or misuse are not covered under warranty.
Carrier Damage & Lost in Transit
- If your order arrives damaged by the carrier or is lost in transit, please contact us right away with:Photos of the damaged product (if applicable)Photos of the damaged box/packaging (if applicable)A description of the issue
- Important — Do not throw out any packaging! Please keep all original packaging, boxes, and packing materials. These are required to process your claim. Discarding packaging may affect our ability to resolve your claim.
High-Value Items ($100+)
- For items valued at $100 or more, customers must provide a return tracking number before a replacement will be shipped.
Affirm & Financing Orders
- Affirm or similar financing orders that are cancelled or returned in-store are subject to a 5% service charge. This covers the processing fee charged to us by the financing provider.
- The Affirm service charge does not apply to confirmed defective or warranty returns.
J&L Aquatics strives to maintain the lowest prices economically possible. In most cases we have the lowest price in the Canadian marketplace, but in the rare occasion that we do not, please feel free to contact us at 604-444-1161 or through e-mail to discuss an opportunity to price match.
