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.

Hagen Fluval U2 Underwater Filter

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Description

🧊 Keep your aquatic world pristine with Fluval U2 — filtration that flows your way!

SPACE SMART DESIGN - Compact footprint with sleek, easy-grip control panel
EFFORTLESS MAINTENANCE - Flip-top lid for quick cartridge swaps without hassle
CUSTOMIZABLE FLOW PATTERNS - Adjust output vertically or horizontally to suit any tank setup
COMPLETE 3 STAGE FILTRATION - Mechanical, chemical & biological filtration for crystal-clear water
VERSATILE AQUARIUM COMPATIBILITY - Perfect for freshwater, saltwater & reptile tanks up to 30 gallons

The Hagen Fluval U2 Underwater Filter delivers advanced 3-stage filtration—mechanical, chemical, and biological—in a compact, versatile design. Engineered for tanks up to 30 gallons, it features a sleek water control panel, flip-top cartridge access, and adjustable flow output to create customized currents or gentle streams. Ideal for freshwater, saltwater, and reptile environments, this filter combines effortless maintenance with powerful performance, making it a top choice for aquarists seeking reliable, space-efficient water purification.

Specifications

ASIN	B001Q1HPGE
Best Sellers Rank	#18,032 in Pet Supplies ( See Top 100 in Pet Supplies ) #154 in Aquarium Filter Accessories
Brand	Fluval
Brand Name	Fluval
Capacity	110 Liters
Customer Reviews	4.1 out of 5 stars 11,102 Reviews
Global Trade Identification Number	00015561104708
Included Components	Filter
Installation Type	Freestanding
Item Dimensions L x W x H	10"L x 4"W x 5"H
Item Type Name	HAGEN FLUVAL U2 UNDERWATER FILTER
Item Weight	1.7 Pounds
Manufacturer	Rolf C. Hagen (USA) Corp.
Material	Plastic
Material Type	Plastic
Model Name	HAGEN FLUVAL U2 UNDERWATER FILTER
Model Number	HGA470
Other Special Features of the Product	Weather Resistant
Part Number	HGA470
Power Source	Manual Operation
Product Dimensions	10"L x 4"W x 5"H
Purification Method	Reverse Osmosis
Special Feature	Weather Resistant
Supported Water TDS Level Maximum (PPM)	1000
UPC	015561104708
Unit Count	1 Count
Warranty Description	Manufacturer Warranty

Reviews

C**I

22.02.2014

L**A

22.07.2014

K**K

1.05.2014

B**S

5.03.2016

C**S

5.11.2025

P**N

27.06.2012

A**R

23.07.2016

M**R

26.08.2020

M**O

23.02.2026

"**"

23.02.2026

C**A

7.01.2024

T**X

26.02.2025

M**E

7.01.2026

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

£54.01

Duties & taxes included

In stock

Sold byAmazon UKDelivered 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 UK.

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