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  15. Top 10 Best 20 Gallon Fish Tanks

Top 10 Best 20 Gallon Fish Tanks

#1 Best Product
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#3 Best Product
Hagen HG Fluval Flex Aquarium 57L, 15gal, Black Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches Aqueon Aquarium Fish Tank
Hagen HG Fluval Flex Aquarium 57L, 15gal, Black Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches Aqueon Aquarium Fish Tank
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Scores calculated from 2240 reviews

Top Choice
1

Hagen HG Fluval Flex Aquarium 57L, 15gal, Black

  • Hagen HG Fluval Flex Aquarium 57L, 15gal, Black
  • Hagen HG Fluval Flex Aquarium 57L, 15gal, Black
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Hagen
EAN: 0015561150064
UPC: 015561150064
Model: AHG15006
Part Number: AHG15006
Size: 15 Gallon
Warranty: Manufacturer Warranty
Height: 0.39 inches
Width: 0.39 inches
Length: 0.39 inches
2

Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches

  • Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches
  • Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches
  • Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches
  • Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches
  • Tetra Deluxe Aquatic Turtle Kit, 20-Gallon, 30 x 12 x 12-Inches
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Spectrum Brands Pet, LLC
EAN: 0047497332306
UPC: 047497332306
Model: NV33230
Part Number: NV33230
Size: 30 IN
Warranty: See label for details
Height: 1 foot 5 inches
Width: 1 foot 3 inches
Length: 2 feet 9 inches
3

Aqueon Aquarium Fish Tank

  • Aqueon Aquarium Fish Tank
  • Aqueon Aquarium Fish Tank
  • Aqueon Aquarium Fish Tank
  • Aqueon Aquarium Fish Tank
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Central Aquatics
EAN: 0015905000260
UPC: 015905000260
Model: 100528607
Part Number: 100528607
Size: 10 gallon
Warranty: 90 Days
Height: 1 foot 1 inch
Width: 10.5 inches
Length: 1 foot 8 inches
4

SeaClear 20 gal Acrylic Aquarium Combo Set, 24 by 13 by 16", Clear

  • SeaClear 20 gal Acrylic Aquarium Combo Set, 24 by 13 by 16, Clear
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Pet Partners dba North American Pet
EAN: 0019034122008
UPC: 019034122008
Model: X1010012200
Part Number: X1010012200
Size: 24 by 13 by 16"
Height: 1 foot 4 inches
Width: 1 foot 1 inch
Length: 2 feet
5

SeaClear 29 gal Show Acrylic Aquarium Combo Set, 30 by 12 by 18", Clear

  • SeaClear 29 gal Show Acrylic Aquarium Combo Set, 30 by 12 by 18, Clear
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Pet Partners dba North American Pet
EAN: 0019034122909
UPC: 019034122909
Model: X1010012290
Part Number: X1010012290
Size: 30 by 12 by 18"
Height: 1 foot 6 inches
Width: 1 foot
Length: 2 feet 6 inches
6

SeaClear 26 gal Flat Back Hexagon Acrylic Aquarium Combo Set, 36 by 12 by 16", Clear

  • SeaClear 26 gal Flat Back Hexagon Acrylic Aquarium Combo Set, 36 by 12 by 16, Clear
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Pet Partners dba North American Pet
EAN: 0019034352603
UPC: 019034352603
Model: X1010035260
Part Number: X1010035260
Size: 36 by 12 by 16"
Height: 1 foot 4 inches
Width: 1 foot
Length: 3 feet
7

GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter

  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
  • GloFish 20 Gallon Aquarium Kit with LED Lights, Decor Heater and Filter
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: United Pet Group
EAN: 0047497338230
UPC: 047497338230
Model: NV33823
Part Number: NV33823
Size: 20-Gallon
Warranty: see label / insert
Height: 1 foot 8 inches
Width: 1 foot 4 inches
Length: 2 feet 3 inches
8

Aqueon Fish Tank Aquarium LED Kit, 10 Gallon

  • Aqueon Fish Tank Aquarium LED Kit, 10 Gallon
  • Aqueon Fish Tank Aquarium LED Kit, 10 Gallon
  • Aqueon Fish Tank Aquarium LED Kit, 10 Gallon
  • Aqueon Fish Tank Aquarium LED Kit, 10 Gallon
  • Aqueon Fish Tank Aquarium LED Kit, 10 Gallon
  • Aqueon Fish Tank Aquarium LED Kit, 10 Gallon
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Central Aquatics
EAN: 0015905000109
UPC: 015905000109
Model: 100527256
Part Number: 100527256
Size: 10 gallon
Warranty: Not Applicable
Height: 1 foot 1 inch
Width: 10.5 inches
Length: 1 foot 8 inches
9

Tetra Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor

  • Tetra Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
  • Tetra Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
  • Tetra Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
  • Tetra Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
  • Tetra Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
  • Tetra Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: United Pet Group
EAN: 0782560425553
UPC: 782560425553
Model: NV33821
Part Number: NV33821
Size: 20 gallon
Height: 1 foot 8 inches
Width: 1 foot 4 inches
Length: 2 feet 3 inches
10

Imagitarium Preferred Winston Tank Stand - for 29 Gallon Aquariums, 12.5 in

  • Imagitarium Preferred Winston Tank Stand - for 29 Gallon Aquariums, 12.5 in
RATINGS
Durability
Value
Overall
Specifications:
Manufacturer: Imagitarium
EAN: 0800443222171
UPC: 800443222171
Part Number: 6114-N
Size: 12.5 IN
Height: 2 feet 5 inches
Width: 2 feet 6 inches
Length: 1 foot

Best 20 Gallon Fish Tank Reviews

 

Have a pet allergy? Don't want to clean pet hair off of your furniture for the next 20 years? A fish might be a wonderful companion to consider. Fish are the perfect pets for an apartment that doesn't allow cats and dogs and a great addition to a home already filled with other furry friends. Often after someone's first experience with a pet fish, they're hooked and ready to fill their home with other species. However, the more fish you adopt, the more space your fishy friends need. Check out a 20 gallon fish tank or 20 gallon aquarium kit if you're ready to grow your fish family!

 

See also:

 

Best Beginner 20 Gallon Aquarium Kit

 

Marina LED Aquarium Kit

 

If you've been interested in becoming a pet fish owner for some time with no idea where to start, look no further than the Marina LED Aquarium Kit. A perfect kit for beginners, this aquarium start-up set comes with a 20 gallon glass tank, a slip-on filter with filter cartridges, and even a guide to help you get started with your first fishy family. Plus, you'll get this combo kit at an unbelievable value price! 

 

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Best Expert 20 Gallon Fish Tank

 

SeaClear Acrylic Aquarium Combo Set

 

Have you been building your very own school and developing your passion for pet fish for some time now? The Marina LED Aquarium Kit might be perfect for a beginner, but the SeaClear 26 Gallon Hexagon Acrylic Aquarium Combo Set makes an incredible tank for the seasoned fish caretaker. Acrylic panes make this fish tank half the weight of traditional glass and more than 10 times stronger. Plus, fish-owning experts love that it's clearer than any glass tank they've ever owned. 

 

If you've got kids or other curious furry friends roaming around the house, this tank is a perfect addition; acrylic panes are impact resistant, making it safer to use around other kids and critters. SeaClear makes the perfect tank for anyone looking to expand their fish family!

 

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Best Value 20 Gallon Aquarium

 

Another great beginner kit, the Aqueon Fish Aquarium Starter Kit is a fantastic value; it comes with detailed instructions about set-up and a variety of tank decorations like gravel and plants. With this kit, guesswork is eliminated. All you have to do is decide what kind of fish to keep! Plus, this tank is value priced as well, so any aspiring fish owner can begin their hobby without breaking the bank (or breaking the "tank," if you will). Enjoy your aquatic roommates!

 

Aqueon Fish Aquarium Starter Kits LED NeoGlow

 

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Fish for 20 Gallon Tank

 

If you're a newbie to the aquatic pet game, you might not know that you can't just stock any size tank with however many fish you want. Just like people, different kinds of fish have a different set of needs. You'll need to meet them to keep them happy and healthy. If you're interested in a decently sized 20 gallon tank to display your new pets, here's a quick beginner's guide to how many and what kinds of fish you can stock it with.

 

As a rule of thumb, you should have one gallon of water for every one inch of fish. With this in mind, it's heartbreaking to think about how many fish pet stores pack into one small tank for display. However, take a commonsense approach to this rule. Obviously, putting five one-inch fish in a five gallon tank is a lot different from putting one five-inch fish in the same tank. Don't make your fish suffer being jam-packed into one tank.

 

Before you decide on what kinds of fish you want, take into consideration the following factors:

 

Temperament. Different breeds have different personalities. If you're interested in keeping a larger number of fish, consider a type that enjoys swimming in a community. Keep in mind that some breeds are more aggressive than others.

Size. Often, a larger fish will eat smaller fish. If you value the lives and happiness of your itty bitty pals, don't put them in a tank with a fish twice their size.

Growth. Just like people, the baby fish you first get will grow eventually. Your fish might be one inch now, but it could eventually outgrow a tank.

Tank decor. More plants and décor take up space that your fish will need. Make sure to get a larger tank than you think you might need if you're particularly fond of décor.

 

With those guidelines in mind, here's the top 3 best fish for a 20 gallon long aquarium.

 

Tetra

 

A small fish with two black fins.

 

Tetra are small fish that enjoy a community lifestyle and are pretty easy to maintain. They get along well with other mild-tempered fish, and larger breeds of tetra coexist well with smaller breeds in the same tank. Tetra appreciate company of the same variety (aim for at least 5).

 

Cory Catfish

 

A green corydora catfish skimming gravel in a tank.

 

Corydoras are small bottom-feeding fish that help to keep your tank clean. They do this by eating up leftover food that falls to the bottom of the tank that could cause algae build-up. This is another breed that enjoys living with a few members of its own kind. 

 

Platy

 

An orange sunburst Platy fish.

 

Platies are a perfect, playful fish to add to your 20 gallon fish tank. Just like the other fish on our list, Platies are ideal for a community tank and are great for beginners due to their easy care regimen. 

 

On top of these favorable varieties for this size aquarium, consider adding in other aquatic-dwelling creatures like snails or shrimp for a beautiful variety. Happy fish-keeping!

 

Disclaimers
Disclaimers: At the time of writing, prices and ratings are correct and products are in stock at Amazon. The views and opinions expressed in this article are those of the authors and do not necessarily reflect the official policy or position of the site owner or any brands and companies mentioned here. This article is purely for reference purposes and does not constitute professional advice and may not be reflective of the best choice for your unique situation. This site strives to provide as much accurate information as possible; however, sometimes products, prices, and other details are subject to change. Therefore, this site does not verify for the accuracy of the information presented in this article. This site does not assume any liability for any sort of damages arising from your use of this site and any third party content and services.

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