7 Best Betta Fish Tanks In 2021

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This is our review of the best betta fish tanks in 2021

After reviewing and testing dozens of tanks, I’ve found the Fluval Spec V to be the best overall betta fish tank in 2021.

I’m a seasoned fishkeeper with experience keeping bettas, so I applied what I knew about their behaviors and traits, then made educated choices for the tanks on this list so you can make the best possible decision for your Betta.

The Fluval Spec V passed all of my tests, from being the proper size, to having decent lighting and filtration.

However, I understand that your needs may be different than what the Fluval Spec V has to offer, so I reviewed other tanks that offer similar and unique benefits!

Let’s get started.

Our Best Betta Fish Tanks

  1. Fluval Spec V (Best Overall Tank)
  2. Fluval Edge 2.0 Aquarium Kit (Best Premium Tank)
  3. Marina LED Aquarium Kit (Best Value Tank)
  4. Marineland Portrait Blade Light Aquarium Kit (Best Cheap Tank)
  5. BiOrb Halo Aquarium Kit (Best Looking Tank)
  6. Fluval Sea Flex Aquarium
  7. Tetra LED Cube 3 Gallon Tank

Fluval Spec V Aquarium Kit

Starting the list with the best overall betta fish tank on our list is the Fluval Spec V. It has everything you could ever need to keep betta fish.

The first key feature of the tank is its efficient shape and design. The Fluval Spec V is a 5 gallon tank, making it the perfect size for keeping betta fish. It’s also designed horizontally, making it a great candidate to keep bettas as they love to swim from side to side.

Another huge feature of the tank is the filtration system. The Fluval Spec V aquarium kit boasts a complete 3 stage filtration system, using a combination of mechanical, carbon, and ceramic biomax media to ensure the water inside the tank is crystal clear.

This filtration system will not only ensure clear waters, but will make sure that spikes in chemicals like ammonia won’t happen as often. This’ll keep the water stable, allowing your Betta to live a happy, healthy, and stress-free life. Of course, you will still have to do your part in maintaining the tank to keep the water safe!

The lighting system inside the tank is another huge plus too. The lights are made from a powerful 7000K LED lighting fixture, which makes this tank great for growing freshwater plants. 

The newest generation of the Fluval Spec Vs have 20% brighter lights than the previous generation. This’ll ensure that your betta will look more colorful and vibrant inside the tank. 

Like most things in life, the best comes with a price. The Spec V Aquarium Kit is one of the more pricier options on this list. However, especially in fishkeeping, you get what you pay for.

Considering the powerful lighting, 3 stage filtration, and perfect 5 gallon horizontal design of the tank, we believe the Spec V is a great value for your dollar.

So if you’re looking for the best overall fish tank for your Betta, with all the features to keep them happy and healthy, consider the Fluval Spec V

  • Beginner Friendly
  • Easy To Setup and Maintain
  • Best Filtration Unit
  • Best LED Lighting Unit
  • Perfect Size and Shape To Keep Bettas
  • Looks Amazing
  • Cost

Fluval Edge 2.0 Aquarium Kit

For those that are looking for the best betta fish tank that money can buy, the Fluval Edge 2.0 ranks in a league of its own. 

It comes in two variants, a 6 and 12 gallon size. While the 6 gallon tank is sufficient for keeping a betta fish, the 12 gallon tank is large enough to house a couple tank mates along with your betta.

The part I love most about this tank is the sleek and modern design. The tank is made of 360 degree crystal clear glass, allowing you to get a full view of your fish! The glass sits inside a pedestal, creating the illusion of it floating in mid-air as well. This’ll make it a great choice for those trying to design their house with a minimalist style in mind.

Speaking of design, the Fluval Edge 2.0  runs on external filtration. This is great news because the risk of common issues like fish getting sucked inside the filter are now GONE! Plus, who wants a clunky filter inside their tank when it can be hidden?

It’s a neat and stylish safety feature if you ask me 🙂

Another cool design about the Fluval Edge is the sealed top. Long gone are the days of fish escaping from the top of your tank!

I remember when I first started fishkeeping, the tank I was using had an open top. A couple days after I added my first fish to the tank, the sucker jumped out. My younger self was devastated  🙁

However with a sealed top, the oxygen levels inside the tank can be quite low. Therefore, when filling the tank, leave a little bit of room for air at the top. 

Other than that, this tank blows our hats away. So if you’re looking to purchase the best betta fish tank money can buy, the Fluval Edge 2.0 is for you!

  • Available In Both 6 And 12 Gallons
  • Simple And Modern Design
  • 360 Degree Viewing Angles
  • External Filtration
  • Easy To Setup And Maintain(Beginner Friendly)
  • Cost
  • Sealed Top Can Limit Oxygen

Marina LED Aquarium Kit

Known as the value for your dollar tank, the Marina LED Aquarium Kit has everything you need to be successful in fishkeeping.

This kit is packed with all the stuff you’ll need to open up your first betta tank. From the detailed aquarium care guide for beginners to the tank itself, you’re really getting a bang for your buck on this one!

The care guide will walk you through how to set up the tank, as well as showing you how to properly maintain it. From calculating portions to cleaning the tank, the guide will cover everything you need to know to be a successful fishkeeper.

Alongside that, you’ll get some AQUA Plus water conditioner and Cycle Biological supplements to make sure that the water is safe for your betta fish!

Equipment wise, the main thing I noticed is that the filter was quiet, and that it didn’t take up much space. And from what I’ve seen so far, the filter does an excellent job of keeping your tank clean.

Alongside that, the LED lights do a great job at illuminating the whole tank as well. Really, you can’t go wrong with a Marina LED Aquarium Kit considering all of the features you get for the price!

  • Available In 5, 10, And 20 Gallon Sizes
  • Quiet Filter
  • Comes With A Detailed Beginners Guide
  • Powerful LED lighting
  • Easy to Setup And Maintain
  • Great Choice For Beginners
  • Filter Doesn’t Have A 3-Stage Filtering Process.

Marineland Portrait Blade Light Aquarium Kit

Cheap, reliable, and good looking, this tank is great for anyone wanting to purchase a quality aquarium kit without breaking the bank.

The unique 16.8” tall portrait design of the tank, along with the curved glass makes this a perfect tank to put on your desk at the office or at home.

The vertical design also allows your Betta to experience more of the tank as decorations and plants take up a lot less room.

For the equipment, the filter boasts 3-stage filtration and adjustable flow settings, allowing you to tailor the flow specifically for your betta.

However, the filter can suck in some more adventurous fish, so you’ll have to be cautious of that. Otherwise, the filtration unit inside this tank is absolutely amazing.

Lighting wise, the tank is lit with hinged LED lights, making it easy to access and clean the tank. The bright white LED lights also create a shimmering effect, which makes a cool looking show on the inside!

So if you’re looking for a cheap betta fish tank that’ll pack most of the features of other tanks on this list, the Marineland Portrait Blade Light Aquarium Kit may be for you!

  • Cheap
  • 3-Stage Filtration
  • Adjustable Flow Settings
  • Easy To Setup And Maintain
  • Beginner Friendly
  • LED Lighting Creates Shimmering Effect
  • Not A Huge Amount Of Space To Decorate
  • Back Part Of Filter Is Narrow

BiOrb Halo Aquarium Kit

For those that don’t want the “normal looking” fish tank, the BiOrb Halo Aquarium Kit will definitely satisfy your needs. This out-of-this-world spherical tank will have you in awe every time you see it, or at least that’s what it did to me. 

This aquarium is made out of acrylic, which is stronger and lighter than glass. It’s also clearer too, which will allow you to get a better view of your fish.

The top of the tank is specifically designed by BiOrb to hide the waterline, creating a seamless look. Not only that, but the lid is also attached by magnets, allowing you to easily attach and detach the lid to feed your fish and maintain the tank itself. Pretty cool if you ask me!

One thing to note is that the spherical shape of the tank means there’s not alot of room on the floor to decorate. This can be a bummer if you’re into aquascaping and decorating.

However, my favorite part of this tank is the custom 16 color remote that’ll allow you to change the color of the lighting inside the tank. This’ll allow you to add some more uniqueness to this already unique tank. Super cool!

So if you’re looking for something “unique”, consider purchasing the BiOrb Halo Aquarium Kit.

  • Coolest Design
  • 5-Stage Filtration
  • 16 Color LED Remove
  • Well-Designed Lid For Feeding
  • Magnetic Lid
  • Quite Expensive For A Four Gallon Tank
  • Not A Lot Of Room To Decorate

Fluval Sea Flex Aquarium

The 15 gallon Fluval Sea Flex Aquarium is an awesome nano tank! With the viewing panel curved outward, you’ll get some nice views of your fish that you can’t get with other tanks!

The compartment on the back of the tank holds all of its equipment, allowing the equipment to be completely hidden when viewing the tank. From the multi-stage filtration system to the heater and other equipment, you wont notice anything is there!

The tank uses 7500K LED lights, which are perfect for growing live plants. The lights also come with a remote that’ll allow you to change stuff like color schemes and fine tune the light spectrum.

With the tank being 15 gallons, you’ll have plenty of room to add decorations, plants, and even other tank mates to live with your Betta! Overall, the Fluval Sea Flex Aquarium is truly a great tank for keeping Betta Fish.

  • Fully Integrated Lid, Lighting, And Filtration Unit
  • Easy To Setup And Maintain
  • Curved Viewing Panel
  • Beginner Friendly
  • Dedicated Compartment On Back To Hide Tank Equipment
  • Cost

Tetra LED Cube 3 Gallon Tank

Last but not least, the final tank on our list of the best betta fish tanks is the Tetra LED Cube 3 Gallon tank.

For those of you who are keen on purchasing a smaller tank, this is the absolute smallest kit I would recommend for your betta. The reason being, you don’t want to cram your betta inside too small of a tank, as it needs to live and swim comfortably. 

The thing I love most about this tank is its simple design. In fact, I have one of these puppies on my desk right now, and it’s a blast to look at.

While the tank comes with a filter and LED lighting, it’s missing a heater. So if you do choose to go with this tank, PLEASE buy a small heater. 

Other than that, the Tetra LED Cube 3 Gallon tank is a great budget tank to keep betta fish in.

  • Attractive Design
  • Affordable
  • Easy To Setup And Use
  • Filter Is Loud And Prone To Some Issues

What To Look For When Buying A Betta Fish Tank

When choosing a betta fish tank, it’s important to know what to look for. Here are the 5 main things you need to consider when buying a betta fish tank.

Proper Tank Size

Betta fish first originated from Southeast Asia, living in shallow streams and rice paddies. With that, most people assume you can put one in a small bowl or vase and they’ll be fine. 

However, you CANNOT keep them in tiny bowls or vases. The reason for this is because they’re animals and need to LIVE. Just imagine if you had to live your entire life in the space of a small to medium sized room. I probably wouldn’t even be able to handle a week 🙁

A good rule of thumb is to keep a betta fish in an aquarium no smaller than 5 gallons. That’ll give them enough room to swim around comfortably.

When choosing a tank for a betta, bigger is always better.

Good Filtration

Another thing you’ll need to consider is if your tank comes with a filter. Although it’s true that Bettas come from still waters, you’ll still need to make sure the water is safe for them to live in.

The key to keeping happy, healthy bettas is to make sure they’re not overly stressed. For that reason, you’ll want a gentle, adjustable filter, as Bettas can struggle with stronger currents.

If your tank doesn’t come with a filter, or the filter is too powerful, you can opt in to buy a separate filter.

Proper Lighting System

Bettas are insanely beautiful fish, with that, you’ll want to be able to actually see your Betta. Choosing a tank with bright LED lighting is a great way to get the job done. 

LED’s are energy efficient and are really good at showcasing your Bettas range of colors.

Bettas also need a regular day and night light pattern schedule. So make sure to choose a tank with a day and moonlighting LED system to ensure your fish stays happy and stressed free!

Good Style

We all know how stylish Bettas are. After all, their insane beauty is the reason why they became so famous among the fishkeeping community.

Therefore, you’ll want to do your fish justice by housing them in an equally spectacular tank. Choosing a tank with multiple viewing angles will give you the best experience.

However it’s important to put the health of your fish first. You shouldn’t make your decision because the tank “looks cool”. Instead, look at the many benefits the tank will add to your bettas life.


Finally, the last thing you should consider when choosing a betta fish tank is the price. 

You don’t want to break the bank, but at the same time you don’t want to purchase something junky that’ll harm your fish.

On our list, we looked for quality products at an affordable price, thus giving you the best bang for your buck. 

Our Verdict

A great betta fish tank is one that’s not too small, and provides good lighting and filtration for your aquatic friend. 

Brownie points if the tanks stylish 🙂
The Fluval Spec V checks all of these boxes, making it the best betta fish tank in 2021!

Photo of author
Hey there, my name is Gunnar Kennedy. I'm a fishkeeping enthusiast who's been in the hobby for over a decade now! I love sharing new ideas and helping others care for their aquatic friends!

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