20 gallons is a great size for someone who wants a larger fish tank but doesn't want something that's going to be very difficult to manage. You could easily fit 5-10 small to medium sized fish in a 20 gallon fish tank, which is great for beginners who want a bit of variation in their fish tank.
You could get a custom 20 gallon fish tank, but there are lots of brands out there that sell great 20 gallon fish tanks in a range of dimensions and styles. Our expert team has rounded up some of the best 20 gallon fish tanks you can buy online in this guide:
Tetra Complete Tropical 20 Gallon Fish Tank
We included 2 aquariums from Tetra in our 10 gallon fish tank guide, and felt that this 20 gallon fish tank from the brand was also worthy of a place in this guide. It's listed as a starter kit, which means it comes with everything you need to get started. This includes a hinged hood, an LED lighting system, an internal filter, and a filter cartridge. It also comes with an aquarium heater and a thermometer, plus a water conditioner sample. It's made from glass and has dimensions of 24 inches wide by 12 inches deep by 16 inches high. It's also worth mentioning that the reviews for this aquarium are excellent, with literally thousands of people rating it very highly.
GloFish 20 Gallon Aquarium Kit
If you're new to fishkeeping and you're looking for a 20 gallon aquarium that has everything you need and that you can get started with immediately, then this fish tank kit from GloFish is a great option. It comes with everything you could possibly need, from LED lighting to decor. It even comes with a Tetra Mini UL Heater and a Tetra Whisper 20 Filter. It's made from glass and has dimensions of 24. 2" L x 12. 4" W x 16. 7" H.
Allcolor Ultra Clear Rimless Aquarium Tank (21 gal)
This 21 gallon glass aquarium from Allcolor is another very simple option, but is great for people who want to customize their setup. It's made using low iron, ultra clear glass which allows for an excellent viewing experience. The glass is 5mm thick and will provide a very safe environment for your fish or whatever animals you have in the tank. It has dimensions of 23.6"L×13.7"W×14.9"H, and it comes with a glass canopy, stand, and base mat. This fish tank has a near perfect rating from hundreds of online reviewers.
Landen 20 Gallon Ultra Clear All Glass Aquarium
One of the best things about this 20 gallon aquarium from Landen is that it's very easy to setup for either freshwater or saltwater - this is because of the sophisticated rear filtration chamber which includes a rear pump. We also really love the sleek design of the tank, and the rimless glass is super stylish. The fish tank has dimensions of 17.7''Wx17.7''Dx15.8''H, and the glass is 6mm thick.
Coospider 20 gal glass fish tank
If you're looking for an aquarium that has everything you need to get started, this 20 gallon tank from Coospider is a great option. The built-in pump filters, oxygenates, and creates waves to keep the water clean, and the built-in temperature system keeps a stable environment, which is very important for fish like Betta and Guppies. At under $200 in price, this fish tank is very afforable given how excellent it is.
We hope this guide helps you to choose a great 20 gallon fish tank. If you have any questions, please don't hesitate to contact us.