5 Best 20-gallon Saltwater Aquarium (Tank) In 2021 Reviews




You’re very picky when it comes to choosing a perfect 20-gallon saltwater aquarium?

You’re not sure about design and features?

We are sure you will find the best models in our post. We picked the most amazing models from the market and reviewed them so you can check all the needed details.

The Summary

BEST OF BEST 20-GALLON SALTWATER AQUARIUM
BEST OF BEST 20-GALLON SALTWATER AQUARIUM summaryGloFish Aquarium Kit Fish Tank
Modern design and functional features are all you need to start your aquatic home. Beautiful LED lights will provide a special effect and great reflection.
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BEST CHEAP 20-GALLON SALTWATER TANK
BEST CHEAP 20-GALLON SALTWATER TANK summaryAqueon Long Aquarium
The simple design of this long tank is the best choice for every living space. A sturdy glass aquarium will last you for a long time.
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BEST WITH FILTER 20-GALLON SALTWATER AQUARIUMBEST WITH FILTER 20-GALLON SALTWATER AQUARIUM summary
Marina LED Aquarium Kit
The aquarium is equipped with all needed accessories for a daily routine and easy maintenance. This glass tank is suitable for different fish breeds.
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BEST PLANTED 20-GALLON SALTWATER TANK
BEST PLANTED 20-GALLON SALTWATER TANK summaryTetra Aquarium Fish Tank Kit
If you need a whole setup this model is best for your fishes. A sturdy glass aquarium is equipped with all the needed features.
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BEST CORAL REEF 20-GALLON SALTWATER AQUARIUM
BEST CORAL REEF 20-GALLON SALTWATER AQUARIUM summarySeaClear Acrylic Aquarium Combo Set
The seamless design is always a great choice if you want easy fitting model. Acrylic material will provide great transparency and a crystal clear view.
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5 Best 20-gallon Saltwater Aquariums

BEST OF BEST 20-GALLON SALTWATER AQUARIUM

GloFish Aquarium Kit Fish Tank

Modern Design
This GloFish model is for sure one of the most popular on the market because of its functionality and modern design that easily catches attention. Sturdy construction will last you for a long time.

BEST OF BEST 20-GALLON SALTWATER AQUARIUM

Thick Glass
The aquarium is made of thick glass and it has a silicone bottom to prevent slipping. This model is ideal for saltwater and safe for any fish breeds. Place this aquarium on a sturdy stand that can easily hold the weight of a tank.

Artificial Plants
With a measurement of 27.88 x 16.13 x 20.38 inches, this 20-gallon saltwater tank kit is suitable for multiple fishes in different sizes and colors. For the best decorative habitat, you will get artificial plants in the package.

GloFish Aquarium Kit Fish Tank

Multiple Accessories
This betta fish starter kit includes LED lights in blue color for best reflection and a filtration system for easy maintenance. Additional accessories like a glow stick, fishnet, and samples for fishes are included, as well.

In Short:

  • Functional and modern design
  • Thick glass for durability
  • Suitable for different fish breeds
  • Artificial plants and other accessories included in the package
  • Filtration system for maintenance

BEST CHEAP 20-GALLON SALTWATER TANK

Aqueon Long Aquarium

Simple Design
If you’re searching for a functional model for a good price, this Aqueon is a great choice. Simple design always fits well in living space, and this aquarium will look like a part of your home decor.

BEST CHEAP 20-GALLON SALTWATER TANK

Clear View
20-gallon saltwater tank is made of glass so you don’t have to worry about durability. Clear transparency will provide a better view so you can enjoy the beauty of colors every day.

Long Tank
This betta breeding tank measures 30.25 x 12.5 x 12.75 inches, so you can tell it is longer than the rest of the models from our reviews. This will provide more space for enjoyable swimming.

Aqueon Long Aquarium

Opened Top
The aquarium is suitable for marine and freshwater applications. Easy feeding thru opened top will save you time daily. This model doesn’t come with additional features.

In Short:

  • An affordable model with a simple design
  • Sturdy glass and great transparency
  • Long tank for multiple fishes
  • Opened top for easy feeding
  • Additional features are not included

BEST WITH FILTER 20-GALLON SALTWATER AQUARIUM

Marina LED Aquarium Kit

Easy Fitting
If you need a whole setup so you don’t need to worry about daily maintenance, this Marina aquarium is one of the most popular ones on the market. A simple and functional design will easily fit in your living room.

BEST WITH FILTER 20-GALLON SALTWATER AQUARIUM

Durable Construction
This model is also made of glass, so you can be sure about durability. This 20-gallon saltwater aquarium measures 30 x 18 x 22.3 inches and it has 33 pounds so make sure you place it on a sturdy stand.

Clipon Filter
The aquarium is equipped with a clip-on filter which will keep your fish environment fresh and clean every day. You can easily change the filter cartridge when needed.

Marina LED Aquarium Kit

Included Accessories
The self-cleaning betta tank has lights for better reflection. In the package, you will get a thermometer, fishnet, and different samples for fishes. The aquarium is suitable for fishes of different sizes and breeds.

In Short:

  • Functional model for beginners
  • Sturdy glass construction
  • Clip-on filter for a clean environment
  • Included accessories in the package
  • Suitable for fishes different sizes and breeds

BEST PLANTED 20-GALLON SALTWATER TANK

Tetra Aquarium Fish Tank Kit

This model is for sure one of the most practical for beginners, and you will get all the needed features and accessories to start your aquatic home. A simple design can easily fit in every home or apartment.

BEST PLANTED 20-GALLON SALTWATER TANK

Rectangular Shape
A 20-gallon saltwater tank measures 27.88 x 16.13 x 20.38 inches, and it is suitable for multiple fishes in different sizes and colors. The model is made of sturdy glass and this rectangular shape can fit on every sturdy stand.

Quiet Filter
Aquarium has a quiet filtration system so you don0t have to worry about daily cleaning. The hood has LED lights for better reflection and we recommend adding colorful plants for a better view.

Tetra Aquarium Fish Tank Kit

Included Features
Planted goldfish tank comes with fishnet, samples, and plants in the package. The hole at the top will provide easy feeding daily. The aquarium can be installed in few minutes so you can immediately place your fishes in a new habitat.

In Short:

  • Simple design for living space
  • Suitable for multiple fishes
  • Quiet filtration system
  • Hood with LED lights
  • Included accessories in the package

BEST CORAL REEF 20-GALLON SALTWATER AQUARIUM

SeaClear Acrylic Aquarium Combo Set

High-quality Materials
A transparent aquarium always catches everyone’s attention and this model will easily match with your home decoration. This aquarium is made of high-quality materials so you don’t have to worry about durability.

BEST CORAL REEF 20-GALLON SALTWATER AQUARIUM

Acrylic Tank
The seamless design is made of acrylic material which is much stronger than glass. Even acrylic material is stronger, it is lighter so you don’t have to worry about safety. Place it on a stand or commode that can easily hold the weight of a tank.

Fish Breeds
With a measurement of 36 x 12 x 16 inches, this 20-gallon saltwater aquarium is suitable for multiple fish breeds of different sizes. You can add a larger coral reef in the middle which will look very impressive.

SeaClear Acrylic Aquarium Combo Set

Great Reflection
To provide the best reflection, this tank is equipped with LED lights on the top so you can have the best view at night. Additional equipment is not included so you can buy it separately. Combine this tank with a smaller betta fish wall tank as decoration.

In Short:

  • Transparent aquarium for easy fitting
  • Seamless acrylic tank
  • Lightweight for fitting on a stand
  • LED lights on the top
  • Suitable for multiple fishes

How To Pick The Best 20-gallon Saltwater Tank?

We are sure it is not easy to pick a model with the best features but when you check our guide with all the needed information and tips you will know which aquarium is perfect for your living space.

Durable Aquarium – Large aquariums like 20-gallon models need to be made of durable and sturdy models which are saltwater approved, so you don’t have to worry about the safety of your pets. Usually, tanks are made of acrylic material or glass and they don’t need to be expensive, you can find very cheap betta fish tanks with high-quality construction.

Saltwater Environment – Saltwater aquariums need to have a salinity tester, which will measure salt content in the water, so you can be sure your fishes are in a healthy environment. Make sure water temperature is always optimal for the fishes, and we recommend getting a thermometer with a heater for easier maintenance.

Fish Breeds – Because you’re picking a saltwater model, it is important to know which fish breeds are for saltwater. Make sure you check all details before buying them. You can place multiple fishes inside, in different colors and sizes. Some fish breeds tend to be more aggressive, so be careful which breeds you’re picking.

Sturdy Stand – It is very important to have a stand or commode that can hold the weight of aquariums when they’re filled with water. Usually, 20-gallon saltwater tanks are around 35 pounds so make sure you check the stability of stands before placing the tank on them. We always recommend a stand made of wood that is durable and strong.

Accessories And Features – LED lights are great additional features that will provide better reflection, especially at night. If you’re a beginner we recommend picking a model with included filter system, so you don’t have to worry about a healthy fish environment. Many models come with included accessories like food samples, fishnet, or artificial plants for decoration.

To Sum Up

The best 20-gallon saltwater aquarium you can find on the market is GloFish Aquarium Kit Fish Tank. A functional and sturdy model with all the needed features and colorful LED lights is all you need for your living room. If you want to check other models that we reviewed, read our post and pick the best 30-gallon saltwater tank. For tables and commodes, pick a 1-gallon betta tank as decoration.




Diane
Diane has a Master’s degree in Economy. Her work experience began in 2016. when she graduated and got her first job in the pet company. The interest in pets and animals was increasing over time and finally, she decided to write about pets. On Petovly, her domain is dogs, cats, hamsters, and guinea pigs. She is in touch with many experts who share their professional knowledge with her helping her to complete the articles.