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Fluval FLEX 57L Aquarium Kit, 15 gallon - Black

Was: $169.99
Now: $149.99
14 reviews Write a Review
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Fluval FLEX 57L Aquarium Kit, 15 gallon - Black    

The Fluval Flex not only offers contemporary styling with its distinctive curved front, but is also equipped with powerful multi-stage filtration and brilliant LED lighting that allows the user to customize several settings via remote control.

Dimensions: 16" W x 15" D x 15" H


  • Included: Aquarium, Light, Pump, Filtration Media. 
  • Heater sold separately


Key Features :

  • 7500K LED lamp supports plant growth and enhances fish colors
  • Fully adjustable White + RGB LEDs for endless color blends 
  • FLEXPad remote can also control fun special effects (i.e. fading cloud cover, lightning bolts)
  • Powerful 3-stage filtration for superior water quality
  • Oversized mechanical (foam), chemical (carbon) and biological (Biomax) media included
  • Multi-directional dual outputs for customized water flow
  • Hidden rear filter compartment 
  • Stylish honeycomb wrap conceals water line and sides of rear compartment
  • Easy feed top cover opening
  • Bold curved front design
  • For freshwater use only


Product code: 6298
Item No. AQ-A15006

14 Reviews

  • 5
    Very satisfied customer

    Posted by Scott on Mar 9th 2023

    I am very pleased with your products, prices, and your packaging to ensure that my Fluval aquarium was well protected during shipment. Being said I have made several more purchases from your company and I would highly recommend other aquarists to do business with your company.

  • 5

    Posted by Dorin on May 1st 2020

    Awesome tank. Service and shipping were phenomenal! Easy set up. Could not be happier with my purchase!

  • 5
    Fluval Flex 15 gallon

    Posted by Dalton on Apr 23rd 2020

    I am extremely happy with this aquarium. It came very fast to within 75 miles of my home and they held it up for a week because of covid priorities. But it was there on the day aquacave said it would be. So they upheld their part. I am very happy with Aquacave and their service and products

  • 5
    Fluval 15 flex

    Posted by Brian on Jun 4th 2019

    Awesome set up, first time buying from aquacave and everything is perfect I’ll definitely keep purchasing from you guys. I already got my tank running

  • 5
    Great buy

    Posted by Luc on Jun 2nd 2019

    Aquacave shipped the product promptly and the packaging was top notch. The aquarium is truly ingenious with the ability to have filets, heaters...out of sight. Now to achieve that you need to take the actual swimming area down to a 10 gallon Aquarium. I knew that when I bought it as I had done my research.<br>Nice light system with a day mode and night mode. Only thing that could make it better is that the lights would switch from day to night on their own

  • 4
    Nice simple good looking tank

    Posted by Great purchase on Jul 3rd 2018

    Great starter tank for beginner. Bought this tank for my Betta, & few community fishes going into. The LED light at mole easy to use. Only mod I did was put a filter screen into the nozzle to slow down the flow for Betta. It’ll be five star if they come with flow adjust for pump but for the money it’s a good buy.<br>

  • 4
    Good buy!

    Posted by AM on May 16th 2018

    Sloppy silicone job on one side.<br>Rest everything is awesome.

  • 5
    Pristine Nano Aquarium Setup

    Posted by Ruby's Fishtank on May 15th 2018

    This Fluval Flex 15 gallon is exactly what we wanted for setting up our first planted/fish aquarium.<br>The all-in-one system is convenient from the filtration to the lighting. <br>We are enjoying our NEW Pristine Nano Aquarium every day.

  • 4
    Great aquarium after mods.

    Posted by Julia E on Apr 17th 2018

    Shipped and arrived quickly. Tank was easy to setup. Holes for intake were too big for my nano fish. I tried putting a fluval sponge in between cover and grate but that stopped up the water too much. Ended up cutting plastic sewing canvas to size and sliding guard attachment through it. Worked great! Carbon and bio bag are small to the size of the aquarium. Added a couple more to the filter. There is plenty of room for it. The filter current was too strong. Added fluval edge sponge to each outtake. Now it’s perfect. Heater fits nicely in filter. Cover is awkward to get flat with cords in back. Had one fish jump and one shrimp jump/climb the filter wall into the filter. He’s fine but shrimp died on sponge. Overall, would buy again.

  • 5
    Love this product.

    Posted by Jennifer on Mar 24th 2018

    Arrived in perfect condition. Love the shape of this aquarium. Easy to aquascape. Happy with the design of the filter system.

  • 5
    Fluval flex 15gal

    Posted by zoeykitten2008 on Feb 2nd 2018

    Fish tank came packaged very well. Everything has been working well. The only thing I need to fix is the hose to the filter is alittle to short and won’t reach the bottom of the tank so it makes a humming noise because of it. Very pleased with the tank and glad I bought it. They did price match too.

  • 4
    Great design

    Posted by shawn on Jan 19th 2018

    Love the tank i set it up as a nano reef tank. Only complaint it one side had a very sloppy silicone job. Fixable, but not what you want from a 15 gallon tank that costs over $100 that said id still buy another one if i need to.

  • 5
    Great purchase

    Posted by Rod on Jan 17th 2018

    Great tank and filter system. Easy to setup and operate. Arrived in perfect condition. Plan on purchasing another soon.

  • 5
    Nice Aquarium

    Posted by Victor on Dec 8th 2017

    Great purchase. Arrived in perfect condition. Easy setup. Still going through cycling and so far no problems.