A 20 gallon aquarium kit with filter and LED lighting is the minimum size tank recommended for beginners who want to provide an ideal house for their aquatic pets. In this review, I will cover some of the best 20 gallon fish tanks for sale (include standard/long/high tank, glass/acrylic material, rectangle/half-moon shape) that you can choose from based on your needs and budget.

Marina LED 20 gallon aquarium, best kit for beginners

Marina LED 20 gallon aquarium kit is the best aquarium kit for everyone from starters to the advanced hobbyists. It has satisfied most customers by the clear glass tank, powerful filter and many other features needed for the beginning hobbyists.

The Marina Slim S20 filter is very quiet, smooth and doesn’t take up much space in your tank because it is a Hang-On-Back power filter. It is also the most powerful piece that everyone talks to praising about the kit. The filter is very powerful, it keeps the tank clean and water clear for a long period for less maintenance. Many customers report that their pet fish are very happy and healthy in the new larger and very clean environment provided by the kit.

Marina LED aquarium kitMarina LED aquarium kit

Other supplies such as fish food, Aqua Plus water conditioner, cycle biological supplement, a fish net, an aquarium care guide are also included that is very helpful for your aquarium setup and maintenance. The kit doesn’t come with a heater for tropical fish; however, you could easily buy one in the pet stores. You will need to buy a 50-75 watt heater.

With its very affordable price and being easy to set up following the aquarium care guide included, beginners could easily venture into the wonderful hobby of fish keeping. I strongly recommend the kit for any starters.

Tetra 20 gallon aquarium kit with filter and heater

Tetra 20 gallon aquarium kit comes with a heater for tropical fish tank setup, and you only need to buy some additives and gravel to fulfill the setup. With a natural daylight effect from the LED hood and the quiet but very powerful water flow provided by the Tetra Whisper 20 filter, it is ideal for aquascaping a planted aquarium with the kit. Moreover, the product quality and wholehearted service from the leader in underwater wonder – Tetra® USA will surely satisfy you.

Tetra Glofish aquarium kit 20 gallon for Glofish

Comes with some essential equipment like the previous kit; however, the Tetra Glofish aquarium kit intends for showing off the fluorescent lighting from Glofish. The blue LED light and the different glow factors that come with the kit give GloFish an exciting fluorescent look. Besides, some other supplies and decors needed for setting up a Glofish tank are also included such as Glofish plants and Glofish Yellow Anemone. A heater is for keeping the temperature ideal for Glofish because they are tropical fish and need a warm temperature of 72-80°F (22-27°C). Everything you need is to add gravel and fish to complete your aquarium.

Read the full review of the kit: http://lovefishtank.com/20-gallon-glofish-aquarium-kit.html

Tetra Color Fusion 20 gallon aquarium kit

Like two previous kit, this wonderful kit comes with a special LED light that is capable of cyclical color change. You can also pause the cycle on any color you like to fully customize your aquarium. Everything looks very lively under the Color Fusion LED.


The Tetra Color Fusion kit comes with two wonderland plants that come to life under the glow of Color Fusion LED. A Blooming White Anemone are also included that sways with filter current and give the tank a great view under the colorful lighting effects. Let the LED light from the color fusion aquarium kit transform your tank with each color change.

SeaClear 20 gallon acrylic aquarium combo set

SeaClear is a famous brand for its acrylic tanks that usually come in various size from 20 to over 50 gallons. SeaClear 20 gal acrylic aquarium is made of clear acrylic with a durable construction and is a great choice for starters who love the clarity and beauty of acrylic fish tanks.

It has a standard dimension, so it is very easy for you to find and buy other equipment for your setup. Because of its being made of high-quality acrylic, it is safe for both fresh or salt-water applications. If you love the features of acrylic tanks such as clearer, lighter, stronger, safer than glass ones, the SeaClear aquarium is a great choice for you.

Check on Amazon.com

Marineland 20 gallon Half Moon aquarium kit

If you’ve bored with normal rectangle fish tank, the Marineland 20 gallon Half-Moon aquarium kit will make you love it. With its half-moon shape, the kit will be a great piece of any home decor that attracts anyone who visits your home the first time.

This tank features 180-degree seamless views, a black plastic framed bottom and a LED light with 42 white and 3 blue LEDs. The tank with all of its equipment is designed for providing the most wonderful experience for its owner. The light features 3-position switch on, off and blue that can provide great lighting effects for day and night time enjoyment.

Although a filter isn’t included, the clear cover is designed with a pre-cut hole for a filter and the manufacturer recommends Penguin 150 or Tetra EX30 filter for the tank. You may also need a heater if you want to keep tropical fish inside the tank. Make your sound decision if you are attracted by its half moon shape and beauty.

Check on Amazon.com

Grreat Choice 20 gallon long fish tank without equipment

Grreat Choice® 20 gallon long fish tank with a larger, longer profile is a great house for your fish and shrimps. As you know, a longer tank is better for stocking fish than a higher one because it has more surface contacting with the air. The traditional rectangular shape is probably the best as the surface area compared to the water volume is large and allows maximum gas exchange with the air. Other shapes, with smaller surface areas, will need more maintenance and more often water changes.

Moreover, the long tank could do well in accommodating a baby corn snake or an aquatic turtle, so people prefer the long to the high. If you intend to set up a fish, shrimp or reptile tank, the tank is a great choice. The tank doesn’t come with essential equipment like a kit, however, with it’s fairly cheap you can use the leftover money to buy the best equipment for your installation. The aquarium is compatible with a variety of filters and lighting systems on the market today.

How to set up and maintain a 20 gallon aquarium

Remember to give your attention to the dimensions of the tank and the place you want to put it into, make sure it is relative. Besides, the dimensions are very important to choose a stand, hood or other supplies for the tank. If you buy a kit in this review, some equipment may be included so you only need to buy deficient ones.

Now you have chosen some special things needed for the setup. After that, going to my full guide to set up a freshwater fish tank to know how to do as well as what you may need for the process. After the setup, you may want to read how to cycle a new fish tank, and then buying some fish and accommodating the new fish to the tank.

With this tank size you can make a beautiful aquascape and stock many beautiful tropical fish such as German Blue Ram, Neon tetras or other Tetras, Mollies, Swordtails, Platies, Yellow shrimps, Red Cherry shrimps, snails… You should list the fish you want to keep in your new tank firstly, even before you buy the tank. Remember that, buying fish is the final step after all of other steps in this article.

See more: http://lovefishtank.com/20-gallon-fish-tank-stocking-idea.html


  1. Marissa says:

    Great article! We just picked up a 20 gallon tank for our office, Teng and Co. This helped us a lot in deciding which fish to get and how many we can put in the tank. We will probably be placing some tetras in our tank since they seem to be very low maintance. Tetras would be a perfect match with out product of slim wallets. Can a recommend a heater that would be best for the fish?

    • Hi Marissa!
      I’m very happy to know my article can help you. For choosing your heater, my recommend is Aqueon Pro heater 50W that you can find in this guide of mine.

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