Best 20 Gallon Fish Tanks (2020 Reviews and Buying Guide)

What’s good everybody. You are looking to make your first purchase of a fish tank but you don’t know where to start? You are looking for a fish tank for your home or office workspace but don’t know which to buy?

Look no further cause we have got you covered. Today we are gonna give you a detailed list of the best 20 gallon fish tanks. Yes, 20 Gallons. These 20 gallon fish tanks can be used in homes as well as workspaces.

The health of aquaculture living in the fish tank depends upon the size of the tank. Its recommended to buy a large fish tank and keep a few fishes and maintain their healthy growth inside the tank.  20 gallon fish tank is a decent number to start with. We are not going to stop at giving you just the list of best 20 gallon fish tanks but we are also gonna give you a decent buying guide to make things easier for you.

So without further ado, let’s dive in

1. Tetra 20 Gallon Complete Aquarium Kit


The first fish tank in the list of the best 20 gallon fish tanks is the Tetra 20 Gallon Complete Fish Tank kit. If you are looking for a bang for the bucks then this is the one for you.

This fish tank has an LED built-in black slim hood that provides enough light to make it look like its daytime. Its premium quality glass is thick and resistant to scratches to make the fish tank look natural. Nevertheless, its filter is built with the technology that delivers efficient, reliable & convenient whisper-quiet water flow. You can use this fish tank for Plantation, turtles, or Fishing.

This fish tank also provides a Tetra Mini UL Heater for the aquaculture to keep the water warm and safe. This also destroys germs and controls the filtration cycle more efficiently with water. The package also offers one artificial boxwood plant + 4 artificial plants within a limited time deal. If you need a safe and beautiful fish tank to mount your home or workspace, go grab it today. The Tetra 20 Gallons Fish tank comes with a lifetime warranty. So what are you waiting for?

Features:

  • LED Built-in Slim Hood.
  • Energy Efficient
  • Filter System
  • Heater
  • Best quality Thick + Scratch less glass.
  • Big Display
  • Lifetime Warranty
  • A perfect combination to cheer up your Happiness.

 Specifications:

  • Product Dimensions: 27.9 x 16.1 x 20.4 inches
  • Shipping Weight: 34.1 pounds
  • Available Size: 20 Gallon Size

Pros:

  • Slim hood
  • Installed LED
  • Scratch-less Glass
  • Filtration Process
  • Heater
  • Artificial Plants
  • All Accessories
  • Easy to Install & Setup

Cons:

  • No Thermometer
  • No Conditioner
  • Few customers gave negative reviews about its filtration system and heater

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2. Aqueon LED Aquarium Kit 20 Gallon, Black:


Aqueon Fish Tank is a pro-styled 20 gallons fish tank. It has a black edge with all-sided glass and a wide display providing a charming view of the 20 gallon fish tank. it has 4 Series LED lights preinstalled inside the fish tank hood. Its Quiet Flow 10 LED Pro Power Filter is one of those features that make it as attractive as it might be. Its filter makes water cleaning super easy.

The fish tank has a 100W Powerful Heater installed to keep the water warm and prevent fish from freezing due to the cold. It also regulates all functions properly. In addition, this fish tank is available in 20 gallon capacity with a Premium Fish Food pack. A water conditioner is also included in this pack to ensure good water quality.

It saves you spending hundreds of dollars purchasing different items. Stick on the thermometer to monitor water temperature regularly. It is perfect to gift your friends on Birthday, Christmas Eve, or Easter. We also recommended you to buy it for home and get comfy with it.

Features:

  • LED Built-in Slim Hood.
  • Quiet Flow Filtration System
  • 100W Heater
  • “A Quality” Thick Glass.
  • Customer’s Choice
  • 1 Year Warranty

 Specifications:

  • Product Dimensions: 24.2 x 12.5 x 19.5 inches
  • Shipping Weight: 33 pounds
  • Available Size: 20 Gallon
  • Made in: America

Pros:

  • Slim hood
  • Installed LED
  • Thick Glass
  • Quiet Flow Filtration Process
  • 100W Heater
  • Stick In Thermometer
  • Fish Food + Fish Net
  • Water Conditioner
  • All Accessories
  • Easy to Install & Setup

Cons:

  • Issues with Filter
  • Heater Issues
  • Expensive

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3. GloFish Aquarium Kit with LED Lighting and Filtration Included


GloFish has built a fish tank within 20 Gallon range with perfect features and specifications making its product as one of the top-selling fish tanks in this range. This 20 gallon fish tank offers LED Lights on the hood, a mini Heater, and a powerful filter to keep the fish tank clean of harmful substances.

Additionally, many other products like 3 GloFish Plants, Yellow Anemone are also packed to make your fish tank look delightful and add beauty to your room. The premium fish food packet for making fishes comfortable with the fish tank and their dinner for a few days is offered by GloFish as well.

If you are a newbie who wants to learn more about fish tank maintenance and take your hobby to the next level, this fish tank comes with a free guidebook to help you with that. It also comes with a 1-year warranty making it more appealing. But a few people gave it negative reviews for its filter system.

Check the product thoroughly once it arrives at your doorstep. In case of any damage just complain and change your item. It is easy to set up and install and you’ll have no issues with it. If it aligns with your interest, buy it today without hesitation

Features:

  • LED Built-in Slim Hood.
  • Filtration System
  • Mini Heater
  • Fish tank Plants
  • Premium Fish Food
  • Customer’s Choice
  • Guide Book
  • 1 Year Warranty
  • Recommended for Beginners

 Specifications:

  • Product Dimensions: 27.9 x 16.1 x 20.4 inches
  • Shipping Weight: 34.5 pounds
  • Available Size: 20 Gallon

Pros:

  • Slim designed hood
  • Installed LED
  • Blue Dark Light
  • Mini Heater
  • Premium Fish Food + 3 Decor Plants
  • Water Conditioner
  • All Accessories
  • Easy to Install & Setup
  • 1 Year Warranty

Cons:

  • Filtration Issues Complaint
  • Not recommended for just newcomer

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 4. Marina LED Aquarium Kit 20 Gallon


This fish tank is made for passionate hobbyists and fish lovers. The most thrilling feature in this fish tank is its LED Light. With its efficient UV LED light, hundreds of issues can be resolved with a single button. It kills debris and harmful particles and also gives daylight to the whole fish tank. Many happy customers reviewed it as their best-purchased product with its Efficient Filtration system. The filter successfully filters out all the dust and debris particles making the odor and discoloration go away.

Another thing that draws attention is its cheap price. It’s offering all the essential accessories including quick-change filter cartridges and LED features, Max Fish Food for a healthy lifestyle of your little fishes. The pack also includes a Biological Supplement, Water Conditioner for making water more safe.

If you want to buy a fish tank but know nothing about fishes, then fear not. This 20 gallon fish tank comes with a free guidebook. It is effective for growing plants as well as fishes. This is perfect to gift someone on their Birthday or Christmas occasion. You can buy it risk-free as it comes with a complete 1 Year Warranty. Shop now for a better and effective experience!

Features:

  • Efficient LED Lights.
  • Filtration System
  • Water Conditioner
  • Max Fish Food
  • Biological Supplement
  • Customer’s Choice
  • Guidebook
  • Easy to Install
  • 1 Year Warranty
  • Recommended for Beginners

 Specifications:

  • Product Dimensions: 30 x 18 x 22.3 inches
  • Shipping Weight: 37.4 pounds
  • Available Size: 20 Gallon

Pros:

  • Energy Saving Powerful LED
  • Durable Filtration Process
  • Water Conditioner
  • Max Fish Food
  • Accessories
  • Economical Price to Shop
  • Easy to Install & Setup
  • 1 Year Warranty
  • Recommended for Beginners

Cons:

  • No Heater
  • No Thermometer
  • Not recommended for bigger fishes

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5. Tetra 20 Gallon Complete Aquarium Kit LED Filter Heater Fish & Plants:


Tetra 20 Gallon fish tank has a Slim Black Look. It has a customizable LED Light Transformation System which means that you can easily change the color of light and the whole scene inside the fish tank. Amazing right? Not only that but it has a good and hidden filter to make the fish tank look more beautiful. You can maintain the water temperature on a normal level with the help of its UL Heater installed.

This fish tank and it’s high-quality accessories helps the fishes in growing faster than before keeping their health perfect. Users need fish tanks sometimes for plantation, sometimes for fishes. But this fish tank is equally suitable for both types of users. Before installing it, take safety measures, and don’t forget to add gravel on the surface of the fish tank. Do keep in mind about the decoration of the fish tank and appearance.

You can easily order with a single click and get an amazing price to buy the fish tank. But we recommend doing product research as written below before buying it. Here, Tetra Kit is offering 1 year of product warranty.

Features:

  • Efficient LED Lights.
  • Filtration System
  • Water Conditioner
  • Max Fish Food
  • Biological Supplement
  • Customer’s Choice
  • Customizable Product
  • Guide Book
  • Easy to Install
  • 1 Year Warranty
  • Recommended for Beginners

 Specifications:

  • Product Dimensions: 30 x 18 x 22.3 inches
  • Shipping Weight: 37.4 pounds
  • Available Size: 20 Gallon

Pros:

  • Energy Saving Powerful LED
  • Durable Filtration Process
  • Water Conditioner
  • Max Fish Food
  • Accessories
  • Economic Price to Shop
  • Easy to Install & Setup
  • 1 Year Warranty
  • Recommended for Beginners

Cons:

  • No Heater
  • No Thermometer
  • Not recommended for bigger fishes  

Buy Now On Amazon!

6. Clear Acrylic Aquarium Combo Set 20 Gallons:


This fish tank is only designed for those potential customers who want the best quality accessories for their fish. This includes the best quality fish tank body which is 17 times stronger and only half in weight in contrary to the rest of the tanks. Easy and durable to purchase, this fish tank will surely last for years to come.

Its Crystal Clear Technology is blended with Scratch Resistant substances to protect you from ruining it. If you have kids in your house, then this feature will come in handy. It is specially designed for both freshwater and saltwater usage. It will survive many strokes without having a single scratch.

This is made with standard quality thick glass; ideal for the gift on Christmas or Birthdays. You can use it for both Planation and fish keeping. It is available in two shapes Rectangle and Hexagon. You can choose any as per your requirements and space available. You can buy it with a year’s Warranty and Amazon Quality Refund Policy. To experience the best product, order it now!

Features:

  • Fine Quality
  • Crystal Clear Texture
  • Thick Glass
  • Scratch Less Properties
  • Customer’s Choice
  • Can be Customize
  • Easy to Install
  • 1 Year Warranty
  • Recommended for Beginners and Pros

 Specifications:

  • Product Dimensions: 24 x 13 x 16 inches
  • Shipping Weight: 23 pounds
  • Available Size: 20 Gallon

Pros:

  • Ideal Quality
  • Crystal Clear Glass
  • Thickness
  • Scratch Resistant
  • Customizable
  • Easy to Setup and Install
  • 1 Year Warranty
  • Recommended for Beginners & Pros

Cons:

  • No Accessories.
  • No Filter, Heater.
  • Expensive, not for people on a budget. 

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7. OCEANIC SYSTEMS INC. All Glass Aquarium AAG10021 20G


The fish tank offers a quality glass combined with black finishing which increases the beauty of its design. Its glass quality is solid and dense, but the drawback is that there are no featured accessories available with it. So, you have to buy all the accessories afterward, spending some more money and burning your pocket. This fish tank is perfect for you if you want to customize it according to your needs.

Hundreds of customers gave it 5 Stars ratings expressing their flawless experience with this amazing 20-gallon fish tank. If you want to grow plants or want to build a customized fish tank of your own choice, this will be a great option to consider.

Keep in mind to place it in a wide space so whenever you clean it or install some accessories within it, there would be no chance of any cracks or splitting. Always keep enough space so it can be moved easily. Shop it if you’re interested in creating a customized fish tank. It is exclusively available with 1 warranty. So, feel free to order it right now!

Features:

  • A Grade Quality
  • Crystal Clear Glass
  • Scratch Less Property
  • Customizable
  • Customer’s Choice
  • Easy to Install / Maintain
  • 1 Year Warranty
  • Recommended for Creative Hobbyists

 Specifications:

  • Product Dimensions: 30.2 x 12.5 x 12.8 inches
  • Shipping Weight: 23.9 pounds
  • Available Size: 20 Gallon

Pros:

  • A Grade Quality
  • Crystal Clear
  • Thick
  • Scratch Less
  • Easy to Install & Maintain
  • 1 Year Warranty
  • Recommended Creativity

Cons:

  • No Filter
  • No Heater
  • No Accessories
  • Expensive
  • Not for Newbies

Buy Now On Amazon!

8. Tetra Aquarium Reptile Glass Kit with Two Dome Lamps


If you are looking for a unique and rare fish tank in the market that stands out, then this is probably what you were looking for! This fish tank with a size of 20-gallon is designed with a modern two dome lamps built inside the fish tank hood. You can label it as the best available option in the market. Its dull black slim hood adds more beauty to its design.

However, it is specially designed to keep reptiles like turtles, more so than fish. It includes all essential accessories inside the kit to make your experience overwhelming. It includes a super quality water filter to clean the water. Its filter offers 3 stage filtration processes covering Mechanical, Biological, and Chemical cleansing of water. Dome lamps use the Electric Light Health Methodology to keep the water warm and safe.

This kit includes a food supplement bag along with a water conditioner for making water more than just fine. It can be used by all levels of hobbyists and aqua lovers. This will give you a comfortable experience. This 20-gallon fish tank reptile glass kit is available with 1 Year of Warranty over limited stock. Buy it now!

Features:

  • Efficient LED Bulbs
  • Dome Lamps
  • 3 Stage Water Filtration Process
  • Water Conditioner
  • Warm Water
  • Fish Food
  • Customer’s Choice
  • Guide Book
  • Easy to Install
  • 1 Year Warranty
  • Recommended for All Stage Aqua Lovers

 Specifications:

  • Product Dimensions: 33.9 x 15.8 x 17.7 inches
  • Shipping Weight: 47.3 pounds
  • Available Size: 20 Gallon

Pros:

  • LED Bulbs
  • 3 Stage Filtration Process
  • Water Conditioner
  • Fish Food
  • Perfect Ratings
  • Easy to Install & Setup
  • 1 Year Warranty
  • Recommended for All Users

Cons:

  •    Good for turtles or reptiles.

Buy Now On Amazon!

9. Marineland (Aquaria) AMLPFK20B Bio wheel Aquarium Kit with LED Light, 20-Gallon


This 20-gallon fish tank is available with the best multi-color LED Lights giving it a natural daylight effect. It uses Bio wheel filter technology which eliminates toxic ammonia and nitrate from water thus keeping the fishes safe. It also prevents clogging. The LED lights are also perfect to be used for both plantation and fish keeping. Many customers have given it 5 Star reviews.

It is also providing a “Rite-Size Filter Cartridge” inside the kit that promotes the best water quality, making it cleaner than ever. For maintaining the water temperature during cold seasons, it is offering an energy-efficient Heater to be installed inside the fish tank. You can easily check the temperature with the thermometer that comes with it. Nevertheless, fish food and water conditioners are also available with this fish tank kit.

You can easily move it anywhere from the living room to the workspace depending upon space and area available, wherever is convenient for you. In many cases, people also broke their fish tanks due to a lack of care while shifting or installing them. So, keep this in mind while placing it. This fish tank comes with a full 1-year money-back guarantee.

Features:

  • Efficient LED Lights.
  • Bio-Wheel Filtration System
  • Water Conditioner
  • Fish Food
  • Thermometer
  • Customer’s Choice
  • Guide Book
  • Easy to Install
  • 1 Year Warranty
  • Recommended for All Stages

 Specifications:

  • Product Dimensions: 26 x 20 x 15 inches
  • Shipping Weight: 33 pounds
  • Available Size: 20 Gallon

Pros:

  • Slim designed hood
  • Installed LED Lights
  • Bio-Wheel Filtration System
  • Mini Heater
  • Premium Fish Food
  • Water Conditioner
  • Thermometer
  • Other Accessories
  • Easy to Install & Setup
  • 1 Year Warranty
  • Recommended for Beginners & Advancers

Cons:

  • Few Customers complain about their issues with Filter
  • Not recommended for just newcomers

Buy Now On Amazon!

10. Elive Aqua Duo 20 Gallon LED Kit Aquarium Starter Kits:


This fish tank filter is different from all the above, exclusively designed to make the fish tank look as natural as possible. It has a LED Light integrated inside the hood and a dual-purpose fish tank filter. It filters the water using aquaponics scientific method, where plants grow without soil taking debris as a source of energy as it has nitrogen in it. Because of the nitrogen. the water cleans itself and oxygen is transferred naturally inside the fish tank.

This kit comes with a bio-media and a food bag. Moreover, for a better understanding & learning how it works, a free Setup Guide is available. The Aqua Duo Technology enables the user an opportunity to easily understand the process and invest in something perfect. It could be an unmatchable product for giving as a present during birthdays, anniversary, and Christmas occasions.

Keep it as simple as it is. Let’s promote the usage of naturally created products. This Elive aqua duo 20 is a perfect glass fish tank designed to maintain a healthy and comfortable growth of fishes. Different types of house plants & flowers, herbs & grasses or small vegetables can be used to absorb nitrogen and release oxygen by filtering water. Order it now as it comes with 1 year of product Warranty

Features:

  • Multicolor LED Lights.
  • Aquaponics Filtration System
  • Natural Product
  • Thick Glass
  • Food Bag
  • Customer’s Choice
  • Setup Guide Book
  • Easy to Install
  • 1 Year Warranty
  • Recommended for All Stages

 Specifications:

  • Product Dimensions: 25.5 x 14.2 x 17.5 inches
  • Shipping Weight: 36 pounds
  • Available Size: 20 Gallon

Pros:

  • Slim designed hood
  • Built-in LED Lights
  • Aquaponics Filtration System
  • Food Bag
  • Other Accessories
  • Easy to Install + Setup
  • Guide Book
  • 1 Year Warranty
  • Recommended for All Stages

Cons:

  • No Heater
  • No Thermometer
  • Few Customers complain about issues with glass
  • Not recommended for commercial space use

Buy Now On Amazon!

Buying Guide For Best 20 Gallon Fish Tanks:

As we promised you, here are a few tips that will make your purchase decision much easier:

1. Glass Quality:

Believe it or not, Glass quality is the most important feature to consider while purchasing any fish tank. Because all other features only work once a fish tank exists. So keep in mind the standard thickness of the fish tank and various add on properties that come with it. Normally people who buy it for their homes have kids and pets. So, buy a fish tank with a scratch-less surface so that the view would never be damaged regardless of anything. Another feature in the glass is its dullness or clear quality. We recommend buying the fish tank with crystal clear glass to make it look perfect.

2. Filter:

The filter cleans the water from harmful and dangerous particles, and make it reliable, suitable, and safe for aqua life. Installing a perfect filter in the fish tank should be considered while choosing any fish tank. It makes the life of fishes more comfortable and promotes their health without any difficulty in containment. There are many sizes and models of filters available as well

3. LED Light:

LED Light does wonders within the fish tank and supports the growth of fishes in many ways. You can easily make the fish tank safe using LED Light. It has multiple benefits as it decorates the whole fish tank with its beautiful colors and gives UV Radiations in a special edition that kills harmful microorganisms from growing. It provides heat to the water as well. Almost every fish tank available is offered with Led lights but choose one with multiple features.

4. Heater:

A lot of times, fishes die because of cold water. To prevent your fish from dying, spend some more dollars buying a fish tank available that features heater in it. Moreover, a thermometer is also recommended. It keeps the water warm which enhances the life and health of fishes or plants. Monitor it with a thermometer and choose the normal mode temperature i.e. good range of heater that ranges from 76° to 80°F (25° to 27°C). A few species live several degrees warmer, and some species require a colder temperature.

5. Energy Efficiency & Noise:

What if you get a bill 2 times higher than usual, all for using electricity inefficiently or Noise coming from the fish tank while trying to sleep at night! That’s why we take this point seriously and recommend reading the product’s specifications and features in detail and saving yourself from getting any unwanted inconveniences. Always buy an energy-efficient fish tank making no filter or pump noise while working. Also, check if a fish tank uses the latest technology in preventing these problems.

6. Check for the Features:

While reading the information check and note the features of the fish tank you are interested in buying.

Conclusion:

So there you have it. We sincerely hope after reading this article you now have a better understanding of fish tanks in general. We tried to make it as detailed as possible explaining all the product features, specifications, pros, and cons. You can easily read the information and have your money invested in the best available tank in the market.

The fish tank can also be perfect to gift someone on different occasions. It will be in their home reminding them of you. Always make a checklist and tick mark the important features you want for any fish tank of your choice. We hope you would like our effort in making your life easy and informative. Before you let us know about your thoughts and experiences. Have you purchased any fish tanks before? Are you willing to buy any of the fish tanks we mentioned on this list? Have you used one of these before?

Read More:

Best 5 Gallon Fish Tanks (2020 Reviews)

Best 10 Gallon Fish Tanks (2020 Reviews)

Best 30 Gallon Fish Tanks (2020 Reviews)

Best 55 Gallon Fish Tanks (2020 Reviews)

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