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Fluval

Fluval Flex 9 Aquarium Kit - Fish Tank for Fish & Plants - Comes with LED Lights, Filtration System & More - 36" x 18" x 18" - 34 L, 9 Gal. - Black

  • Based on 3,561 reviews
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Availability: In Stock.
Fulfilled by Monster Pets
Arrives Sunday, Jun 29
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Color: Black


Size: 9 Gal.


Features

  • Stylish Fluval Aquarium: Contemporary design with curved front and honeycomb wrap that conceals water line and filter compartment sides
  • Customizable LED Aquarium Lights: Fully adjustable 7500K White + RGB LEDs for endless color blends and plant growth support; FLEXPad remote for special effects like lightning bolts and fading cloud cover
  • Powerful Fluval Fish Tank Filtration: 3-stage filtration with oversized mechanical, chemical, and biological media for superior water quality
  • Perfect Pet Supplies: Small fish tank enclosure with multi-directional dual outputs for customized water flow; easy feed top cover opening
  • Innovation for Fish Keepers: Fluval innovates to foster a sustainable future where aquatic life and humankind can thrive in harmony

Description

If you're looking for a fish tank that combines style and functionality, the Fluval Flex 9 Aquarium Kit is the perfect choice. This Fluval aquarium is designed to enhance the colors of your pet fish with its fully adjustable 7500K LED lamp that supports plant growth and provides endless color blends. The LED aquarium light is fully customizable with White + RGB LEDs and is controlled via a FLEXPad remote that also offers fun special effects like fading cloud cover and lightning bolts.But the Fluval Flex 9 Aquarium Kit is more than just a beautiful fish tank—it also boasts a powerful 3-stage filtration that includes an oversized mechanical (foam), chemical (carbon), and biological (Biomax) media to provide superior water quality for your pet fish. The multi-directional dual outputs of this Fluval tank allow for customized water flow, and the hidden rear filter compartment and easy feed top cover opening make maintenance a breeze. With its stylish honeycomb wrap that conceals the water line and the sides of the rear compartment, the Fluval Flex 9 Aquarium Kit is a modern aquarium that will look great in any home. Suitable for freshwater use, this Fluval fish tank is the perfect pet supply for those who want to care for their pets in the best way possible. Fluval is on a mission to bring inspiration and innovation to fish keepers around the world. Through ground-breaking product technologies, educational initiatives, conservation efforts, and strong social media engagement, our brand speaks to all generations of hobbyists to foster a sustainable future where aquatic life and humankind can thrive in harmony.

Brand: Fluval


Material: Acrylic


Tank Volume: 9 Gallons


Special Feature: Lightweight


Product Dimensions: 13.78"L x 13.19"W x 12.8"H


Item Weight: 5.04 Kilograms


Shape: Square


Specific Uses For Product: Indoor


Style: Contemporary


Color: Black


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 13.19 x 13.78 x 12.8 inches; 11.1 Pounds


Item model number ‏ : ‎ 15004


Date First Available ‏ : ‎ November 18, 2016


Manufacturer ‏ : ‎ Rolf C. Hagen (USA) Corp.


Best Sellers Rank: #27,968 in Pet Supplies (See Top 100 in Pet Supplies) #85 in Aquarium Lights


#85 in Aquarium Lights:


Customer Reviews: 4.4 4.4 out of 5 stars 3,561 ratings


Item Weight: 11.08 pounds


Manufacturer: Rolf C. Hagen (USA) Corp.


Item model number: 15004


Date First Available: November 18, 2016


Item Package Dimensions L x W x H: 18.07 x 17.28 x 16.14 inches


Item Dimensions LxWxH: 13.19 x 13.78 x 12.8 inches


Item Weight: 5.04 Kilograms


Brand Name: Fluval


Target Audience Keyword: fish


Directions: Follow individual packaging instructions.


Warranty Description: Manufacturer Warranty


Model Name: Hagen Flex Freshwater Kit - Black - 9 gal


Color: Black


Size: 9 Gal.


Material: Acrylic


Age Range Description: All Life Stages


Care Instructions: Fragile


Number of Items: 1


Style: Contemporary


Included Components: Hagen Flex Freshwater Kit - Black - 9 gal


Specific Uses for Product: Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jun 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • I'd buy it again.
Color: Black Size: 15 Gal.
I have two of these. I liked the 1st one so much, that I added another within the month. I have currently have four Tanks in my Living Room. The built in filters on these are okay, (but) you need to make sure to pull the pumps each time you clean them and remove the pump filter and clean it as well. (Easy to do.) If you do not do this, the water flow will go down considerably reducing thecoverall Filters systems effectiveness. I really like the design of the tank. The included hood and lighting system are nice and you get tons of different lighting options. It is quite easy to add supplemental filters to this set up. I would buy this Fish Tank System again. ... show more
Reviewed in the United States on May 2, 2025 by Ken K.
    • Love it
Color: Black Size: 9 Gal.
I love this tank it's big enough too be seen but small enough to use in my small studio without taking too much space. It is so perfect for my little shrimp it's sturdy I've added the feeding door and a backup pump just in case of burnout because snails have a tendency too get stuck and you won't have a decent flow .10 out of 10 ... show more
Reviewed in the United States on March 30, 2025 by Jonathan Pittman
    • Out of box not great- Have to modify stuff and spend a lot more money to work with this tank
Color: Black Size: 15 Gal.
Problems with this tank setup: Lid locks around almost all sides with very little opening for cords and hoses in the middle of the back. It also does not come with lid props and is a hassle to take on and off every time you have to move a plant, do a partial water change, or clean the filters. The light that is installed in it is very short and narrow so does not fully light the living area. The light also is very limited- no 8 or 12 or 24 hour cycle settings, You can blend the white and RGB so it is 'mostly' white with one color (turn on the white light, reduce it to low, then turn on the RGB and select a color, then turn the white light back up), but without the cycle setting it is a manual hassle. The remote only works if you use it directly pointed at the sensor. The pump is way to strong for Betta fish or other fish that aren't strong swimmers. The pump clogs easily and the tank does not come with a filter block (nest) to put around it The flow valve is also not great- not adjustable for strength and very limited on position. It also has sharp edges that have to be sanded down. The intake chamber is hard to clean because of the ridges/ledges that are in it. The middle chamber with the foam block is easier. But the foam block has very small holes for media. The foam block is also hard to clean because the side that the intake chamber is on gets tightly packed with the muck, and the foam is thick- goo doesn't release easily even with working the sponge for awhile. In conclusion, I have spent a ton of money on top of getting this tank for new lights, smaller grate intake covers, outflow 3-D mods to reduce the flow, less powerful pump, smaller bags and better filter medias, filter nest for the pump chamber, feeding hole cover, lid props, etc. ... show more
Reviewed in the United States on November 12, 2023 by X.Y.Z.
    • We love this tank!
Color: Black Size: 15 Gal.
Review Image by Natalie King Natalie King
After dealing with multiple issues with BiOrb on Amazon, our School at a University decided to go a different route and try the Fluval Flex. It was not a disappointment at all. This is a very spacious and gorgeous tank that was easy to assemble and gorgeous to look at. Admittedly, I did have trouble with the remote to the fish tank light, but that's on me and not the tank (the sensor is at the top so you have to point at it which I wasn't doing). It's really fun to be able to change the colors and dim or brighten them. Very quiet and so far our fish are enjoying the added space. Incoming guests as well as the college students love coming in and watching the fish. Thank you Fluval for being wonderful (and for not being BiOrb)! ... show more
Reviewed in the United States on November 26, 2024 by Natalie King Natalie King
    • Gorgeous tank, faulty lighting
Color: Black Size: 9 Gal.
Ive had my tank almost a year now and its been great! The internal built in filter is low maintenance (rinse the medium now and then). It keeps my tank nice and clean looking and is very quiet. Ive never had any water parameter difficulties. I use black sand as a substrate and the filter has never picked up particles. Its very well made and looks/feels luxurious. I do need to take a star off because the built in lights started malfunctioning after about 6 months. It constantly flashes dark blue lights at random when lights are switched off. Ive tried every setting and unplugging, but nothing stops the lights except turning the lights on intentionally. It doesnt impact functionality at all and I have gotten use to it, but I do worry about the longevity of the LEDs with blue lights always flashing for no reason. ... show more
Reviewed in the United States on February 17, 2025 by Ashley B.
    • Fantastic!! I Love This Aquarium!
Color: Black Size: 15 Gal.
Review Image by Laura R Laura R
For many years, I kept saltwater, brackish, and freshwater aquariums on a pretty large scale. I took a break from the hobby, and recently found myself ready to get back in the saddle, though on a smaller scale. I chose this aquarium for the Fluval name-- I had great prior experiences with Fluval filtration (loved my Fx4!!) This aquarium reignited my love for Fluval. Super quick and easy set-up, attractive, so quiet that you can't hear it running, and the lighting is really sophisticated-- fun to personalize the light settings!! I was pleasantly surprised by the technological advances (and reduced costs) offered by this aquarium, since I was last active in the hobby. Overall, I give this 5+ stars. I plan on buying this set-up again for my parents (and setting up another one for myself!). I do, though, have some suggestions to Fluval, as an experienced aquarist, as to improving this already great aquarium-- 1. The food slot in the front of the tank lid would benefit from having a sliding or hinged door. My cats sit on top of the tank and were easily able to get their paws in, until I installed a mesh cover. 2. It would be nice to have the top hinged, so it would be supported whenever doing water changes. 3. Even though this is a relatively small aquarium, I can see that there might be times that you might want to use additional equipment with it, such as a chiller, sump, or UV sterilizer. However, the current lid design, head space, and design of the partitions between the back chambers doesn't support this. It would be great if those areas could be re-designed to provide flexibility to use additional equipment, as needed. Overall, though, I adore this aquarium!! Already planning my next Fluval Fex 15 gallon tank. Stay tuned! ... show more
Reviewed in the United States on April 15, 2023 by Laura R Laura R

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