Fluval Flex Aquarium Kit, White, 9-gal

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$116.99 (-19%) Chewy Price
$144.99 List Price
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Pay in 4 interest-free payments of $29.25. .

About This Item

Details

  • Features a multi-stage filter.
  • Includes foam, carbon, and biological filtration media.
  • Contains a high-output LED light that supports plant growth and shows off fish colors.
  • Features a remote that lets you switch between lighting modes.
  • Equipped with full white and RGB lighting capabilities.

Size

Frequently bought together

Questions & Answers

8 Customer Questions

Does this come with gravel or rock?

Answer by Chewy • Jun 13, 2025
The Flex kits do not come with any substrate.

Do you only sell white

Answer by Chewy • Jun 18, 2025
At this time, Chewy only carries the white aquarium kit. The manufacturer of this kit carries additional colors that are available directly through the Fluval website.

Does this tank come with a leveling mat?

Answer by Chewy • Dec 18, 2025
Flex tanks do come with a rubber Undertank mat.

Is this good for neocaridina shrimp?

Answer by Chewy • Dec 02, 2025
This kit comes with 2 intake guards that prevent shrimp from going in to the filtration system.
Reviews
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4.3
Rated 4.3 out of 5 stars
64 Ratings
Terms & Conditions

40 Customer Reviews

Rated 3 out of 5 stars
By Carly on Jan 5, 2026

Its pretty and quiet

Easy to set up, pretty and quiet. I like it so far, but didn't clear my initial tank set up for 2 days. Now its fine, the future is to be determined. I wish the

Easy to set up, pretty and quiet. I like it so far, but didn't clear my initial tank set up for 2 days. Now its fine, the future is to be determined. I wish the remote had a quick dim button, bright day, cloudy day, night,

Rated 1 out of 5 stars
By Tess on Oct 28, 2025

Poor quality lighting

I have purchased this tank twice because I love how it looks, first time I bought it from a store, second time from chewy. Both times the tanks light has started

I have purchased this tank twice because I love how it looks, first time I bought it from a store, second time from chewy. Both times the tanks light has started to malfunction within months of purchasing. The first time I let it go as a fluke and just bought a new one from chewy because I decided I wanted white and not black so didn’t bother perusing warranty for the light. I was shocked when the exact same problem happened with the second tank. Unfortunately chewy cannot replace for me unless I send whole tank back which I understand but what am I supposed to do with my fish? I would just have to buy a new tank set up to hold the fish in while waiting for the replacement so what’s the point? Reached out to manufacturer and they provided the same option so I’m basically stuck having to pay again to order a new light direct from fluval or buy another tank set up Would not recommend you purchase this at all, obviously there is some defect in how they manufacture the light for this to have happened to Me twice.

Rated 5 out of 5 stars
By annette on Jan 8, 2026
Top 1000 Contibutor

Nice design

This year for Christmas my fish got a new tank now they’re hiding right now, but I’ll take a picture to show you, but you might see one. There’s like four of them

This year for Christmas my fish got a new tank now they’re hiding right now, but I’ll take a picture to show you, but you might see one. There’s like four of them in there. They do love it.

Rated 4 out of 5 stars
By Matter on Jan 5, 2026

Fluval aquarium.

The tank itself is perfect. The top could be manufactured better. It is way too flimsy. It should be made about twice as thick.

The tank itself is perfect. The top could be manufactured better. It is way too flimsy. It should be made about twice as thick.

Rated 5 out of 5 stars
By Helen on Sep 4, 2025

Love this tank

This tank is a total upgrade from my previous one. I like that the equipment and filter is hidden behind a plastic “wall”. However, this can make cleaning a bit

This tank is a total upgrade from my previous one. I like that the equipment and filter is hidden behind a plastic “wall”. However, this can make cleaning a bit more difficult. You also loose about 1-2 gallons of water in the back compartment so it isn’t a full 9 gallons of swim space. The LED light is fun, but to prevent algae I usually only use it near bedtime to set a chill vibe. I have had betta fish for about 3 years now, this is a great starter tank that gives them enough room to swim. With the tanks design, it takes up less space which is great for small spaces. Overall I love this tank and so far the pros outweigh the cons. It was easy to set up and my fish is happy!

Rated 5 out of 5 stars
By Susanne on Nov 14, 2025

Perfect size!

This 9 gallon tank is the perfect size for what was needed. We are using it as a “hospital “ tank, also for new fish isolation as well as some new plants. No pics

This 9 gallon tank is the perfect size for what was needed. We are using it as a “hospital “ tank, also for new fish isolation as well as some new plants. No pics just yet, but there will be!

Rated 5 out of 5 stars
By Erich on Jul 13, 2025

Fluval Flex

I have a White 9 Gallon Flex and a Black 15 Gallon Flex. Someone in these reviews mentioned a problem of algae. What I have found is that algae in this tank does

I have a White 9 Gallon Flex and a Black 15 Gallon Flex. Someone in these reviews mentioned a problem of algae. What I have found is that algae in this tank does well with the white light setting, and if one sets it to yellow they will not have an algae problem. My suggestion is to use yellow with Java Ferns. The 15 Gallon is a Bare Bottom w some marbles and stuff down there for decoration. The regular filter system, and separate back area works well, and is similar to the competitor's Marineland Portrait. There really is currently enough filtration, yet I added a Corner Filter w a 20 Gallon Whisper Pump, since full grown might be a bit crowded. The 9 Gallon currently has no plants, will be adding later, due to copper treatment that has fixed a problem. The tank should be ok with this current number of fish, I may add some more filtration. I never change the Bio-Rings in the filter, just the charcoal, which is inexpensive. These aquariums are easy maintenance. Algae are easy to scrub off glass vs. acrylic, one just has to keep at it. I have been in the aquarium hobby since I was around 10 years old and I am 68 years old tomorrow. I might know a little bit? When I first began "Exotic Aquarium Fishes" by William Innes had different approaches than what people are doing in the hobby today, yet I find a few beautiful fish, (my 10 gallon has 9 Cardinal Tetras, 1 Red Betta, 3 Cory, with filtration at 200 GPH, HOB and two corners), well...just make sure you have enough filtration, do your cleaning, and one can go over the 1 inch of fish per gallon rule, yet don't go over way too much.

Rated 5 out of 5 stars
By Mingming on Aug 13, 2025

The shape

I really like how the pump and filter are all hidden away. The lights are great and i love the storm affect. The strip the runs along the the top of the tank is

I really like how the pump and filter are all hidden away. The lights are great and i love the storm affect. The strip the runs along the the top of the tank is nice also. It hides the water line. So theres no gap that u can see

Rated 4 out of 5 stars
By Corbin on Nov 13, 2025

Came broken the first time but was sent again and came intact

After coming broken the first time the tank now is functional and working well

After coming broken the first time the tank now is functional and working well

Rated 4 out of 5 stars
By George on Dec 23, 2025

Makes a Real Nice Gift

Nicely designed. You will need a heater and substrate.

Nicely designed. You will need a heater and substrate.