Currently have a 10gallon but will upgrade shortly to a 30ish for a yellow eared turtle. Does this sit on the bottom where it could suck in the food and waste that collects on the bottom where my river rocks are? It has proven hard to get that out and the pleccu is not cleaning it up as of now.

Mine is laying on the bottom of my tank and i have never had it sitting upright. I can tell you it does pretty well sucking everything up. However, i usually have one spot in the tank, right underneath the filter where debris sits. When I need to water change I just make sure I get the debris out with a fish net. That seems to work pretty well. It is the best filter I have had so far (with a turtle that has killed 4 filters), just make sure to clean the motor fan with every water change or filter media change.

Does the U4 filter have space to add activated carbon pellets?

Yes it can, in the center of the filter there a removeable plastic cage. I put a small Chemi Pure bag in it. But I didn't care for this filter and not cause it didn't work. But I was wanting something more as a skimmer type filter and I wasn't getting enough flow out this filter unit. But it did work, if your running this on a smaller tank say no 30 gal freshwater ok. I was running it on a 29 gal reef tank with lots of live rock and it couldn't push enough water around it. But it did filter the water good.

Do all 3 outputs work at the same time?

No, you have to pick a setting. I use mine for moving water in the bottom of my tank. It also seems to be he strongest setting out of the 3 choices

Can I change the direction of the water coming out of the nozzles? For example directing it upwards instead of horizontal.

There's a small directional piece on the end of each nozzle you can turn to minimally direct the flow - but not nearly that much.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fluval U3 Underwater Filter – Designed for Freshwater and Saltwater Aquariums, Also Ideal for Terrariums and Turtle Tanks

Fluval U3 Underwater Filter – Designed for Freshwater and Saltwater Aquariums, Also Ideal for Terrariums and Turtle Tanks

Product ID: 2333775

Details

Brand
Fluval
Color
Black
Included Components
Filter
Item Weight
16 ounces
Material
Plastic
Product Dimensions
12"L x 6"W x

🌀3-stage filtration system

🔄flip-top cartridge access

⚙️3-way adjustable flow control

¥25831

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

🧜‍♂️ Elevate your aquarium game with Fluval U3 — where pristine water meets effortless style!

TRUSTED DURABILITY - Backed by a 3-year warranty and Fluval’s legacy of innovation since 1975, ensuring reliable performance for tanks up to 40 gallons.
CUSTOM FLOW CONTROL - Three-way adjustable flow lets you tailor water currents to your aquarium’s unique ecosystem or create stunning waterfall effects.
TRIPLE STAGE PURITY - Advanced 3-stage filtration traps debris, clarifies water, and boosts biological efficiency for crystal-clear tanks.
VERSATILE PLACEMENT - Position horizontally or vertically to fit shallow tanks, low water levels, or to customize flow patterns for freshwater, saltwater, or reptile habitats.
EFFORTLESS MAINTENANCE - Flip-top lid design ensures quick, no-fuss cartridge changes—spend less time cleaning and more time enjoying your aquatic haven.

The Fluval U3 Underwater Filter offers a powerful 3-stage filtration system with BioMax media, designed for freshwater, saltwater, and reptile tanks up to 40 gallons. Featuring a sleek, ergonomic design with a flip-top lid for easy cartridge replacement and a 3-way adjustable flow control, it adapts to various tank setups including shallow or low water environments. Trusted by aquarists since 1975, Fluval ensures superior water quality and reliable performance backed by a 3-year warranty.

Specifications

ASIN	B001TKZ51E
ASIN	B001TKZ51E
Best Sellers Rank	#16,050 in Pet Supplies ( See Top 100 in Pet Supplies ) #99 in Aquarium Filters #114 in Aquarium Filter Accessories
Brand Name	Fluval
Color	Black
Customer Reviews	4.0 4.0 out of 5 stars (2,149)
Date First Available	August 19, 2004
Global Trade Identification Number	00015561104753
Included Components	Filter
Item Dimensions L x W x H	12"L x 6"W x 5"H
Item Type Name	HAGEN FLUVAL U3 UNDERWATER FILTER
Item Weight	16 ounces
Item model number	A475A1
Manufacturer	Rolf C. Hagen (USA) Corp.
Manufacturer	Rolf C. Hagen (USA) Corp.
Manufacturer Part Number	A475A1
Material Type	Plastic
Model Number	A475A1
Pet Type	Fish, Reptile
Product Dimensions	10.5 x 3.25 x 4 inches; 1 pounds
Product Style	Underwater Filter
Specific Uses For Product	Indoor
Tank Volume	40 gallons
UPC	015561104753 015561104869
Unit Count	1 Count
Vivarium Type	Aquarium
Warranty Description	3 years; Fluval U Series Power Filters are guaranteed against defects in material or workmanship under normal aquarium usage and service for 3 years. We offer a 3 year guarantee on all nonreplaceable parts which means that the filter will be repaired or replaced at the manufacturer's discretion, free of charge, when the complete pump is returned with proof of purchase and postage paid. This warran…

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

¥25831

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

View all Trustpilot reviews