---
product_id: 16476086
title: "Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal."
brand: "fluval"
price: "€ 695.60"
currency: EUR
in_stock: null
reviews_count: 8
category: "Fluval"
url: https://www.desertcart.it/products/16476086-fluval-fx4-high-performance-aquarium-filter-canister-filter-for-aquariums
store_origin: IT
region: Italy
---

# 700 US Gal/hr pump output Smart Pump tech for auto-optimization 1 Gal stackable media capacity Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal.

**Brand:** fluval
**Price:** € 695.60
**Availability:** ❌ Out of Stock

## Summary

> 💧 Elevate your aquarium game with the Fluval FX4 — where smart meets powerful filtration!

## Quick Answers

- **What is this?** Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal. by fluval
- **How much does it cost?** € 695.60 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/16476086-fluval-fx4-high-performance-aquarium-filter-canister-filter-for-aquariums)

## 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

- • **Powerful 700 GPH Flow:** Turbocharge your aquarium’s clarity with industry-leading water circulation.
- • **Smart Pump Technology:** Next-gen microchip control ensures peak performance and energy efficiency 24/7.
- • **Effortless Self-Starting:** Plug in, add water, and let the filter auto-start—no priming, no hassle.
- • **Compact Yet Mighty Design:** Sleek 16.5-inch height fits discreetly under most tanks without sacrificing power.
- • **Customizable Multi-Stage Filtration:** Precision-engineered media baskets eliminate bypass for ultra-efficient cleaning.

## Overview

The Fluval FX4 is a high-performance canister filter designed for aquariums up to 250 gallons. Featuring a robust 700 gallons-per-hour pump, advanced Smart Pump microchip technology for continuous optimization, and removable stackable media baskets holding 1 gallon of filtration media, it delivers superior mechanical, chemical, and biological filtration. Its compact 16.5-inch design fits under most tanks, while self-starting and automatic air evacuation ensure hassle-free, efficient operation. Trusted by thousands for crystal-clear water and easy maintenance.

## Description

Fluval FX4 is a high performance canister filter with many outstanding features designed to make aquarium fish keeping easier and more convenient than ever. This super capacity yet compact canister filter has a pump output of 700 gallons of water and has a filter circulation of 450 GPH, which both work to produce cleaner and healthier results. Filtering material can easily be placed in a removable stack of media baskets, which is at the heart of Fluval's multistage filtration. The baskets are precision-engineered to eliminate water by-pass, making filtration more efficient. The baskets can hold a total of 1 gallon of media and can be stacked in the precise combination of layers that will work best for your aquarium. Each one is lined with a foam insert for effective mechanical pre-filtering. Instant-release T-handles let you lift and separate the baskets quickly and easily, making routine maintenance simpler. FX4 also features Smart Pump Technology, which provides optimal filter performance. This advanced technological feature employs an electronic circuit board that continually monitors the pump. Impeller speed and force are constantly measured to ensure powerful output and energy efficiency. It also manages the filter's self-starting feature and evacuates air that may enter or build up within the filtration system. On a 12-hour cycle, the pump will pause and allow trapped air to escape, ensuring the best filtration efficiency. Only 16.5 inches in height, FX4 fits under most aquariums.Fluval first broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.

Review: Run, don't Walk. Get you one NOW - Absolutely! Hands down the best canister filter out there. If you don't have one and you're waiting, stop, go get it now, you won't regret it. There is no noise. It's easy to install. The flow rate is superb. Water clarity is spectacular. You couldn't ask for anything better. Go get you one! What are you waiting for?
Review: Simply the best filter on the market. - The Fluval FX line of filters is a real work horse which rarely goes wrong if you do the upkeep on it. I use one on the tank I have my turtle in, and it keeps the water crystal clear, even though the old boy digs a lot an tries everything he can to cloud up the water. If I take it off line for cleaning (which is a breeze) or maintenance, it will get the water clear again within an hour if the turtle has been very active while it was off, and much sooner if he wasn't moving around too much. He's a very active turtle, and a very messy eater, but he's neither active enough nor messy enough to overwhelm the FX-6. I also use an FX-6 on my hillstream tank which requires a lot of flow. It pushes the water through at a very good clip so that the stream has a pretty good current for my hillstream loaches and for my rainbow shiners to run in when they're getting ready to spawn. I have the FX-4 on a 20 gallon tank which is probably just a bit overpopulated, But again, it is a good enough filter that it keeps the water quite clean. With surface skimmers on my tanks, even the water's surface is clear. To clean the filter media, all you need to do is lift the media baskets out, the use the filter's bucket to clean the sponges and reusable media, replace the media which has broken down too much to be reused, or which uses chemical treating, then either empty the old water out and replace it with fresh clean, or keep the old water if it's not too bad (it is almost always too bad). The reason you clean the media in the water the filter bucket has in it is so that you don't loose any of the beneficial bacteria which is growing in it. The FX series of filters have variable flow valves, which is a nice feature, though many filters have that. If you close the valves before opening the lid of the filter, you don't have to worry about draining the hoses, and they will be good to go when you turn the filter back on and open the valves. No priming needed. Everything in this filter is easily repairable if something goes wrong. If something happens which wears out the impeller, it's very easy to take the old impeller out, and drop a new one in. It's also easy to replace all the O-rings when they get old and start to loose their ability to seal the unit. If you're unlucky, you might need to do that once a year, but it's more likely that you'll just need put new lubricant on them. I am mechanically challenged, so if I find it easy to take care of, I'm sure just about anyone will be able to do it. I have had problems with several of the other big brands of filter makers, but I have never had a Fluval FX series filter go south on me. I recommend them to anyone who wants to keep their fish's environment clean and healthy. If I ever start another tank, I'll definitely be buying another Fluval FX.

## Features

- Multi-stage filter pumps out 700 US Gal (2,650 L) of water per hour, Smart Pump advanced microchip technology continuously monitors and optimizes pump performance
- Self-starting – just add water, plug in and Smart Pump will take over, trapped air auto-evacuated every 12 hours to ensure maximum efficiency
- Removable, stackable media baskets eliminate water bypass and hold a total of 1 US Gal (3.9 L) of media, all filter media included - mechanical, chemical and biological
- Compact 16.5 in (42 cm) tall design - easily fits under most aquariums

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fluval |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 6,015 Reviews |
| Material | Plastic, Stainless Steel |
| Power Source | Corded Electric |
| Product Dimensions | 15.6"L x 15.6"W x 15.6"H |
| Style | Canister |

## Product Details

- **Brand:** Fluval
- **Color:** Black
- **Global Trade Identification Number:** 00015561102148
- **Item Weight:** 6.43 Kilograms
- **Manufacturer:** Rolf C. Hagen (USA) Corp.
- **Material:** Plastic, Stainless Steel
- **Maximum Flow Rate:** 2650 Liters Per Hour
- **Power Source:** Corded Electric
- **Product Dimensions:** 15.6"L x 15.6"W x 15.6"H
- **Style:** Canister

## Images

![Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal. - Image 1](https://m.media-amazon.com/images/I/710ZcYFglLL.jpg)
![Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal. - Image 2](https://m.media-amazon.com/images/I/71RKE2QdFxL.jpg)
![Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal. - Image 3](https://m.media-amazon.com/images/I/71kUpnbpTOL.jpg)
![Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal. - Image 4](https://m.media-amazon.com/images/I/81-g3azkCyL.jpg)
![Fluval FX4 High Performance Aquarium Filter, Canister Filter for Aquariums up to 250 Gal. - Image 5](https://m.media-amazon.com/images/I/81-qDMNkPEL.jpg)

## Available Options

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

## Questions & Answers

**Q: How is the longevity of the FX6 compared to other filters people have owned? (primarily Eheim). I will be using it in a turtle tank if that matters...**
A: I've been using the Fluval FX5 on my 100 gallon red eared slider turtle tank for about 12 years now. It's worked flawlessly over the years. I'm about to replace it with the FX6 due to various things starting to get worn out. So yes it does have pretty good longevity.

**Q: I have a 40 gallon tank for two read eared sliders. Would this filter be too strong or just right for my tank? Also, does it come with the hosing?**
A: I've got it on a 55 gallon and it works fine! With turtles you want at least 3 times the filtration so 40 gallons of water needs a 160 gallon rated filter or stronger. Also it is recommended that you house your turtles separately as they are going to grow to be 8-12 inches long and are solitary in the wild! I recommend you join red ear slider turtle owners resto group on Facebook and they will have all the information on best diet best filters and best tanks for your turtles!

**Q: I am sitting up a 75 gallons tank in my office i don't want to clean it a lot what fluval pump would you suggest**
A: Frequent water changes aren’t a necessity if you set your tank up accordingly. Look up low maintenance/ self sustaining and see for yourself. I have a 75, 50, 29, and two turtle tanks, turtles being the the only ones I regularly change water. No deaths, plants are healthy(NO SUPPLEMENTS OR CO2 added), water is clear, and I’m using HOB filters with only ceramic balls. There’s guides for what you want online that will help far more than these comments.

**Q: Fluval fx4 or fluval 406? 80 gallon planted tank. what do you think?**
A: If you have a heavy stock of fish I would aim for 7-10x total gallons of filtration. 
Currently running 2 fx6 on my 260 gallon which is about 7x flow rate and I’m debating adding a third to get closer to that 10x mark.

These provide great bio filtration and if you set them up right with some tweaking can agitate the surface of the water which increases oxygen in the water and allows more life to exist in your aquarium.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Run, don't Walk. Get you one NOW
*by T***M on December 12, 2025*

Absolutely! Hands down the best canister filter out there. If you don't have one and you're waiting, stop, go get it now, you won't regret it. There is no noise. It's easy to install. The flow rate is superb. Water clarity is spectacular. You couldn't ask for anything better. Go get you one! What are you waiting for?

### ⭐⭐⭐⭐⭐ Simply the best filter on the market.
*by K***D on October 24, 2024*

The Fluval FX line of filters is a real work horse which rarely goes wrong if you do the upkeep on it. I use one on the tank I have my turtle in, and it keeps the water crystal clear, even though the old boy digs a lot an tries everything he can to cloud up the water. If I take it off line for cleaning (which is a breeze) or maintenance, it will get the water clear again within an hour if the turtle has been very active while it was off, and much sooner if he wasn't moving around too much. He's a very active turtle, and a very messy eater, but he's neither active enough nor messy enough to overwhelm the FX-6. I also use an FX-6 on my hillstream tank which requires a lot of flow. It pushes the water through at a very good clip so that the stream has a pretty good current for my hillstream loaches and for my rainbow shiners to run in when they're getting ready to spawn. I have the FX-4 on a 20 gallon tank which is probably just a bit overpopulated, But again, it is a good enough filter that it keeps the water quite clean. With surface skimmers on my tanks, even the water's surface is clear. To clean the filter media, all you need to do is lift the media baskets out, the use the filter's bucket to clean the sponges and reusable media, replace the media which has broken down too much to be reused, or which uses chemical treating, then either empty the old water out and replace it with fresh clean, or keep the old water if it's not too bad (it is almost always too bad). The reason you clean the media in the water the filter bucket has in it is so that you don't loose any of the beneficial bacteria which is growing in it. The FX series of filters have variable flow valves, which is a nice feature, though many filters have that. If you close the valves before opening the lid of the filter, you don't have to worry about draining the hoses, and they will be good to go when you turn the filter back on and open the valves. No priming needed. Everything in this filter is easily repairable if something goes wrong. If something happens which wears out the impeller, it's very easy to take the old impeller out, and drop a new one in. It's also easy to replace all the O-rings when they get old and start to loose their ability to seal the unit. If you're unlucky, you might need to do that once a year, but it's more likely that you'll just need put new lubricant on them. I am mechanically challenged, so if I find it easy to take care of, I'm sure just about anyone will be able to do it. I have had problems with several of the other big brands of filter makers, but I have never had a Fluval FX series filter go south on me. I recommend them to anyone who wants to keep their fish's environment clean and healthy. If I ever start another tank, I'll definitely be buying another Fluval FX.

### ⭐⭐⭐⭐⭐ Send it!!! You won’t regret it.
*by C***Y on October 1, 2025*

Ive been running the Fluval for about 3 months now, and I am absolutely OBSESSED with its quality. I have a 75 gallon tank with a turtle and pleco (both produce A LOT of waste). Previously I was a die hard Penn Plax Cascade fan for the last 5 years, but my last two had motor failures and they changed their warranty terms finally, so I decided to switch it up. Long ago I wanted a Fluval, but but the price was steep so I settled for less and let me just say it’s the best investment you can make. It’s quiet (don’t know why other reviews say it’s not unless they are keeping their water levels really low), my tank remains crystal clear with my normal monthly maintenance routine, and it is easy to clean and change out my media. The fasteners are really not that complicated and don’t take that long to unlock like other reviews say. The canister itself is designed so that it is air tight and I’ve had no signs of leaking. The outtake is made so you have two options to direct the flow of your water which is helpful if you have a basking platform above half of your tank. Highly recommend.

## Frequently Bought Together

- Fluval FX4 High Performance Canister Aquarium Filter - Multi-Stage Filtration, Built-In Powered Water Change System, and Basket-In-Basket Tray Design
- Fluval FX Spray Bar Kit, Aquarium Filter Water Aeration Accessory
- Fluval E 300 Watt Electronic Heater

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-29*