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Fluval

Fluval Flex 57 - 15 Gallon Nano Glass Aquarium Kit

  • Based on 3,641 reviews
Condition: New
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026

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Availability: In Stock.
Fulfilled by Petco Supplies
Arrives Nov 7 – Nov 10
Order within 5 hours and 9 minutes
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Color: Black


Size: 15 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: 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: Glass


Tank Volume: 15 Gallons


Special Feature: Lightweight


Product Dimensions: 16"L x 15"W x 15"H


Item Weight: 12.72 Kilograms


Shape: Rectangular


Specific Uses For Product: Indoor


Style: Contemporary


Color: Black


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 16.14 x 15.35 x 15.35 inches; 28.04 Pounds


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ 15006


Date First Available ‏ : ‎ December 12, 2016


Manufacturer ‏ : ‎ Rolf C. Hagen (USA) Corp.


Best Sellers Rank: #35,406 in Pet Supplies (See Top 100 in Pet Supplies) #104 in Aquarium Lights


#104 in Aquarium Lights:


Customer Reviews: 4.4 4.4 out of 5 stars 3,641 ratings


Item Weight: 28 pounds


Manufacturer: Rolf C. Hagen (USA) Corp.


Item model number: 15006


Date First Available: December 12, 2016


Item Package Dimensions L x W x H: 20.39 x 20 x 19.69 inches


Item Dimensions LxWxH: 16.14 x 15.35 x 15.35 inches


Item Weight: 12.72 Kilograms


Brand Name: Fluval


Target Audience Keyword: pets


Directions: Use as directed on packaging


Warranty Description: Manufacturer Warranty


Model Name: Hagen Flex Freshwater Kit - Black - 15 gal


Color: Black


Size: 15 Gal.


Material: Glass


Age Range Description: All Life Stages


Number of Items: 1


Style: Contemporary


Included Components: Hagen Flex Freshwater Kit - Black - 15 gal


Specific Uses for Product: Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 7 – Nov 10

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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Top Amazon Reviews

    • Great starter tank!
Color: Black Size: 15 Gal.
Review Image by ChrisGuzi ChrisGuzi
Review Image by ChrisGuzi ChrisGuzi
Review Image by ChrisGuzi ChrisGuzi
Great starter fish tank. Sleek design. I decided to upgrade the filtration and return pump. I'm amazed by the build quality for the price. There are a ton of videos and aftermarket upgrades available for this tank. YouTube and Etsy are your friend for that. I'm looking to purchase the 32gallon version next. ... show more
Reviewed in the United States on August 23, 2025 by ChrisGuzi ChrisGuzi
    • 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
    • Nice quality tank!
Color: Black Size: 15 Gal.
Review Image by Toby Wright Toby Wright
Review Image by Toby Wright Toby Wright
I really like this tank! I was looking for a nice small tank for a planted aquarium. The bow on the front really makes the tank unique and adds a sharp expensive look to the tank. The quality of the glass is nice and the black beading on the back wall and the top rim of the tank really helps clean things up. It nicely hides all the equipment and pumps in the bank and give a nice look to the waterline. The light fixture came DOA, but the seller quickly replaced it and it is now working great. The light is bright and provides a lot of custom options. It may not be the strongest light for a planted tank, but sure looks like it will be more than enough for the plants I am growing. The real compartments are large enough for your own mix of equipment and filter media. The grates on the intakes are a nice touch and will keep small fry or shrimp out of the rear compartments. I added some small filter material inside these grates to further decrease the chance of fry or shrimp entering. The pump is quite strong and is completely silent. I cannot hear it run at all. The tank sits next to my bed and you wouldn't think it was even running. The tank also came with a nice mat for the bottom glass. Overall I am extremely happy with the tank. Ignore the bad or misleading reviews. Perfect planted tank. Great quality and a great price point. Thanks! ... show more
Reviewed in the United States on August 4, 2018 by Toby Wright Toby Wright
    • Lovely Addition to the Family
Color: Black Size: 15 Gal.
The Fluval Flex Aquarium Kit has transformed my space into a stunning aquatic oasis. Its sleek and contemporary design, complete with LED lighting, adds a touch of elegance to any room. Setting it up was straightforward, and the filtration system is efficient, keeping the water crystal clear. The curved front glass provides an unobstructed view of my fish and plants, creating a visually captivating display. However, the provided filter media could be of better quality. Overall, it's a fantastic kit for both beginners and experienced aquarists, offering a stylish and functional home for my aquatic friends. It's brought tranquility and beauty to my living space. ... show more
Reviewed in the United States on September 22, 2023 by Butterfly504
    • Good aquarium with a few caveats...
Color: Black Size: 9 Gal.
I set this tank up about a month and a half ago as a heavily planted aquarium. It arrived in perfect condition and was very easy to set up. I added a heater as it doesn't come with one. The heater fits nicely in the filter compartment that holds the pump. I like the additional filter box compartment for adding additional filter media and for the fact that it hides all the equipment. However, the filter chambers are very small and it's going to be a BEAR to maintain them and keep them clean. The filter flow on this is very strong. But you can position the two flow nozzles, so you can angle them up, slightly out of the water so they just flow more across the surface, point them toward the closest side of the aquarium so they're deflected, or, like I did, simply add this to one or both of the filter flow nozzles: https://smile.amazon.com/dp/B002LL32RY?psc=1&ref=ppx_yo2ov_dt_b_product_details The tank is aesthetically beautiful but unless you're looking at the tank straight on, it gives a distorted view. My biggest disappointment about the tank though is, due to it's largely square shape and the filter compartment across the entire back of the tank, this is NOT a 9 gallon tank. It actually holds less than 7 gallons and once I got my substrate, hardscape and plants in it, there's only a little over 5 gallons of water in it so it SEVERELY cuts down on swim space for your fish as well as what kind and how many fish you can have. Because of this, I probably wouldn't buy this tank again, although it is a very well-made and good-looking tank and would be excellent as a planted shrimp tank or a single betta tank (once you baffle the filter flow). ... show more
Reviewed in the United States on July 14, 2022 by Right2Liberty

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