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.

U4 Underwater Filter Freshwater And Saltwater Aquarium Filter A480 Black

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Description

💧 Elevate your aquarium game with silent power and sleek style!

EFFORTLESS MAINTENANCE - Flip-top lid and easy-grip water control panel make cartridge replacement and flow adjustments a breeze—no hassle, no downtime.
POWERFUL 1000 L H FLOW - Keeps your aquatic environment crystal clear with high-efficiency water circulation.
VERSATILE INSTALLATION - Position horizontally or vertically to customize flow patterns, perfect for freshwater, saltwater, or reptile tanks up to 65 gallons.
WHISPER QUIET OPERATION - Enjoy a peaceful aquatic ambiance with near-silent motor technology, ideal for home or office environments.
ADVANCED 3 STAGE FILTRATION - Foam, poly/carbon cartridge, and biomax combine to trap debris, remove impurities, and optimize biological filtration.

The Fluval U4 Underwater Filter (Model A480) is a high-performance, versatile filtration system designed for freshwater, saltwater, and reptile tanks up to 65 gallons. Featuring a powerful 1000 liters per hour flow rate and a proven 3-stage filtration process—foam, poly/carbon cartridge, and biomax media—it ensures superior water clarity and biological balance. Its sleek black metal design, flexible horizontal or vertical installation, and user-friendly flip-top lid for quick cartridge changes make it a top choice for aquarists seeking efficient, quiet, and customizable filtration.

Specifications

ASIN	B001XRXY1G
Best Sellers Rank	#14,034 in Pet Supplies ( See Top 100 in Pet Supplies ) #758 in Aquarium Accessories
Brand Name	Fluval
Capacity	240 Liters
Container Type	Filtration container
Customer Reviews	4.3 4.3 out of 5 stars (3,138)
Global Trade Identification Number	00015561104807
Included Components	Filter
Installation Type	Freestanding
Item Type Name	HAGEN FLUVAL U4 UNDERWATER FILTER
Item Weight	1.12 Kilograms
Manufacturer	Rolf C. Hagen (USA) Corp.
Material Type	Metal
Maximum Flow Rate	1000 Liters Per Hour
Model Name	HAGEN FLUVAL U4 UNDERWATER FILTER
Model Number	A480A1
Part Number	HGA480
Power Source	Corded Electric
Purification Method	Biological Filtration
Smart Home Compatibility	Not Smart Home Compatible
Supported Water TDS Level Maximum (PPM)	350
UPC	015561104807 764999862437 155611048009 015561104784 081175371515
Unit Count	1 Count
Upper Temperature Rating	80 Degrees Fahrenheit

Reviews

M**O

Acquistato in sostituzione del filtro integrato del mio Askoll Pure XL 94 litri. Con i pesci Oranda, che sporcano moltissimo, il filtro integrato nel coperchio non era sufficiente a garantire una buona filtrazione. L’acqua era sempre torbida e piena di impurità. In più il precedente, essendo integrato nel coperchio di plastica, era estremamente rumoroso. Questo Fluval è incredibile. Estremamente silenzioso, arriva completo di tutti materiali filtranti, ha l’uscita del flusso regolabile: - uscita dal basso - uscita centrale più distribuita - uscita dall’alto con valvola Venturi per l’ossigenazione (più rumorosa per via delle bollicine) Tutti i problemi di sporcizia nell’acqua si sono risolti nel giro di due giorni. In più la manutenzione sembra semplicissima in quanto il filtro è apribile dall’alto e i materiali sono facilmente estraibili. Consiglio a chiunque cerchi un filtro estremamente silenzioso ed efficace con un’ottima portata d’acqua senza necessariamente creare troppe correnti. Prezzo più che adeguato.

23.02.2026

R**L

Just got this filter yesterday so cant say anything about longevity however so far so good! Please follow instructions carefully, I didnt remove the fan and run it under water which caused the fan to not work at first, however once I did that the filter worked great. I bought the filter for my turtle tank as a backup to my canister filter and it works great and turtle doesnt mind it. Also very quiet so far and very powerful!

28.08.2024

T**E

Best in tank filter I’ve had. Bought as original tank filter went down in my 130l , the pros of this filter are - -super quite , hardly any noise -smart looking / blends in / fits nicely -3 different spray modes (top , bottom or middle for gentle flow) So easy to use / setup and for maintenance The water is really really clear with the active carbon in the filter , it comes with ceramic media too which is a bonus Overall really good filter , highly recommend this in tank instead of external canister

29.12.2025

M**G

Bonne efficacité et bon rapport qualité prix

14.01.2025

P**.

Tengo el U4 y una maravilla, lo tengo en flujo central(tiene una plaquita para poner si lo quieres arriba en el medio o bajo) y es perfecto para mi acuario plantado

18.04.2023

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$124.60

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In stock

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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 USA.

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