---
product_id: 343695374
title: "Fluval U3 Underwater Aquarium Filter 150L (40 US Gal)"
brand: "fluval"
price: "1050 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "Fluval"
url: https://www.desertcart.dk/products/343695374-fluval-u3-underwater-aquarium-filter-150l-40-us-gal
store_origin: DK
region: Denmark
---

# 3-stage advanced filtration Top access easy maintenance 800 LPH powerful flow Fluval U3 Underwater Aquarium Filter 150L (40 US Gal)

**Brand:** fluval
**Price:** 1050 kr
**Availability:** ✅ In Stock

## Summary

> 💧 Dive into pristine waters with Fluval U3 – where power meets precision!

## Quick Answers

- **What is this?** Fluval U3 Underwater Aquarium Filter 150L (40 US Gal) by fluval
- **How much does it cost?** 1050 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/343695374-fluval-u3-underwater-aquarium-filter-150l-40-us-gal)

## Best For

- fluval enthusiasts

## Why This Product

- Trusted fluval brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Powerful:** Sleek underwater design fits discreetly in tanks up to 150L (40 US Gal) while delivering robust 800 LPH performance.
- • **Trusted Brand Legacy:** Join thousands of aquarium enthusiasts who rely on Fluval’s proven durability and efficiency.
- • **Effortless Maintenance:** Top-access design lets you clean and service your filter without hassle, saving you time and stress.
- • **Triple-Stage Filtration:** Experience crystal-clear water with mechanical, chemical, and biological filtration working in harmony.
- • **Customizable Flow Control:** Adjust the water flow to perfectly suit your aquatic environment, ensuring optimal comfort for your fish.

## Overview

The Fluval U3 Underwater Aquarium Filter is engineered for tanks up to 150L (40 US Gal), delivering a strong 800 liters per hour flow rate. Featuring a convenient top-access design for easy maintenance, adjustable flow control for tailored water movement, and a comprehensive 3-stage filtration system, it ensures a healthy aquatic environment. Compact and durable, it’s a trusted choice for aquarium professionals seeking reliable performance and crystal-clear water.

## Description

Fluval U3 Underwater Aquarium Filter 150L (40 US Gal) : desertcart.ae: Pet Supplies

Review: Impeller motor didn't work. - New item Motor didn't work. Failed to understand how it can be sent to sale, without quality check? Very disappointed with the fluval brand.
Review: Is it only filter noisy? Just have received - I just unpacked, assembled and inserted in the tank. The whole filter is unbearably noisy. Chippy or idling sound.. no idea but it is quite annoying. By trusting the brand I want to try another. It feels this particular filter has a failure

## Features

- Top Access - for easy maintenance
- Adjustable flow control
- 3 Stage Filtration

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001TKZ51E |
| Batteries Included | No |
| Best Sellers Rank | #3,244 in Pet Supplies ( See Top 100 in Pet Supplies ) #105 in Aquarium Accessories |
| Customer Reviews | 4.0 4.0 out of 5 stars (2,018) |
| Date First Available | 6 August 2012 |
| Item Weight | 902 g |
| Item model number | A475A1 |
| Number of Items | 1 |
| Product Dimensions | 26.67 x 8.26 x 10.16 cm; 901.74 g |
| Quantity | 1 |
| Size | Fluval U3 Underwater Filter 800LPH |
| Special Features | Einfach anwendbar, Innengerät, Langlebig |
| Voltage | 230 Volts |
| Volume | 1 Liters |
| batteries required | No |

## Product Details

- **Brand:** Fluval
- **Capacity:** 150 Liters
- **Material:** Plastic
- **Product dimensions:** 30.5L x 15.2W x 12.7H centimeters
- **Special features:** Einfach anwendbar, Innengerät, Langlebig

## Images

![Fluval U3 Underwater Aquarium Filter 150L (40 US Gal) - Image 1](https://m.media-amazon.com/images/I/71x9jM2Xh2L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: 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.**
A: 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.

**Q: Does the U4 filter have space to add activated carbon pellets?**
A: 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.

**Q: Do all 3 outputs work at the same time?**
A: 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

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

## Customer Reviews

### ⭐ Impeller motor didn't work.
*by S***S on 11 August 2025*

New item Motor didn't work. Failed to understand how it can be sent to sale, without quality check? Very disappointed with the fluval brand.

### ⭐ Is it only filter noisy? Just have received
*by Y***A on 17 May 2025*

I just unpacked, assembled and inserted in the tank. The whole filter is unbearably noisy. Chippy or idling sound.. no idea but it is quite annoying. By trusting the brand I want to try another. It feels this particular filter has a failure

### ⭐ Stopped working within 5 minutes.
*by T***J on 26 August 2024*

Horrible experience stopped working within the first 5 minutes of activating it under water, when I pulled it out the motor itself had become boiling hot!

## Frequently Bought Together

- Fluval U3 Underwater Filter – Designed for Freshwater and Saltwater Aquariums, Also Ideal for Terrariums and Turtle Tanks
- Nosiny 20 Pieces Filter Foam Pad Compatible with Fluval U3 Underwater Sponge Aquarium Underwater Filter Accessories Compatible for Aquarium, Fish Tank
- Fluval U3 Underwater Filter Poly/Carbon

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-08*