Search  for anything...
Tetra

Tetra Aquarium, 20 Gallon, Complete Tropical Fish Tank Kit With LED Lighting And Decor For Freshwater Fish

  • Based on 3,680 reviews
Condition: New
Checking for the best price...
$142.99 Why this price?

Buy Now, Pay Later

As low as $23.83 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Mar 20
Order within 19 hours and 50 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Color: Tetra


Size: 20 gallon


Features

  • GLASS AQUARIUM KIT: The kit includes one glass aquarium with a low-profile, hinged hood, an LED lighting system, an internal filter and filter cartridge, an aquarium heater and thermometer, a water conditioner sample, a food sample and a setup and maintenance guide, plus attractive decor.
  • LED LIGHTING: Energy-efficient LEDs give you a beautiful natural daylight effect.
  • FILTRATION SYSTEM: The included Tetra Internal Filtration System features mechanical filtration to catch debris and chemical filtration with Ultra-Activated Carbon for removal of odors, discoloration and toxins.
  • EASY SETUP: Aquarium kit includes items you need to create a healthy home for your fish.
  • SIZE: This 20-gallon glass aquarium measures 24 inches wide by 12 inches deep by 16 inches high

Description

The Tetra Complete LED Aquarium Kit comes with items you need to create a healthy home for your fish. This complete kit includes a 20-gallon glass aquarium, a low-profile, hinged hood with LED lighting system, the Tetra Whisper PF20 Power Filter with a Tetra Whisper Bio-Bag Filter Cartridge, a Tetra Aquarium heater and thermometer, AquaSafe water conditioner sample, TetraMin food sample and a setup and maintenance guide. The included Tetra Internal Filtration System features mechanical filtration to catch debris and chemical filtration with Ultra-Activated® Carbon for removal of odors, discoloration and toxins. The energy-efficient LED Lighting system gives you a beautiful natural daylight effect. Approximate dimensions 24 inches x 12 inches x 16 inches. Attractive artificial plants add a natural ocean feel. Add gravel and fish to complete your aquarium. Small aquariums are a great way to get started in the freshwater fishkeeping hobby, and with any new hobby involving living creatures, it is always best to learn as much as you can. When buying fish, ask your retailer for guidance in choosing the right fish for your size aquarium. Caution: Children under age 13 should have adult supervision with setup, maintenance and fish care.

Brand: Tetra


Material: Glass


Tank Volume: 20 Gallons


Special Feature: Transparent


Product Dimensions: 24.2"L x 12.4"W x 16.7"H


Shape: Rectangular


Specific Uses For Product: Indoor


Style: Traditional


Color: Tetra


Included Components: See label


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 27.88 x 16.13 x 20.38 inches; 34.17 Pounds


Item model number ‏ : ‎ NV33821


Date First Available ‏ : ‎ August 17, 2015


Manufacturer ‏ : ‎ United Pet Group


Best Sellers Rank: #14,113 in Pet Supplies (See Top 100 in Pet Supplies) #11 in Aquarium Starter Kits


#11 in Aquarium Starter Kits:


Customer Reviews: 4.3 4.3 out of 5 stars (3,744)


Item Weight: 34.1 pounds


Manufacturer: United Pet Group


Item model number: NV33821


Date First Available: August 17, 2015


Item Package Dimensions L x W x H: 28 x 20.35 x 16.32 inches


Item Dimensions LxWxH: 27.88 x 16.13 x 20.38 inches


Brand Name: Tetra


Target Audience Keyword: Fish


Directions: See label


Warranty Description: See label


Model Name: Tetra Aquarium


Color: Tetra


Size: 20 gallon


Material: Glass


Age Range Description: All Life Stages


Style: Traditional


Included Components: See label


Specific Uses for Product: Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Mar 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Good buy
Color: Color Fusion Size: 20 gallon
Review Image by Kaysy Smith Kaysy Smith
I wish it was bit longer instead of taller. Most of your gallons are in height but the tank itself is beautiful and my sharks love it. Easy to clean and the heater that comes with it works great to keep the water warm. I have no leaks or cracks and the filter that comes with it works good. It is a bit louder than other ones but it puts in work. And had a great waterfall sound. It is decently heavy so be prepared to lift with your knees. All in all it’s a great tank and great size for little tetras and angelfish. ... show more
Reviewed in the United States on February 25, 2026 by Kaysy Smith Kaysy Smith
    • The accessories and price is pretty awesome
Color: Color Fusion Size: 20 gallon
Great product and price. Filter is kinda loud though. Love the accessories it came with.
Reviewed in the United States on January 29, 2026 by Laura
    • Product review
Color: Color Fusion Size: 20 gallon
Really nice looks great
Reviewed in the United States on March 3, 2026 by Dan J Niwa
    • The tank itself is wonderful, the stuff it came with, not so much.
Color: Tetra Size: 20 gallon
First, set up was incredibly easy. I had new decor I bought anticipating the decor pictured. It came with some incredibly bright pieces. The lighting is good. The filter started off loud, got quiet, and now I think I need to purchase a different one. It is incredibly loud and obnoxious. Now for the really bad, the heater that was included doesn't work as described. After it said it came to temp, I transferred my fish. My three school fish died overnight. I thought I had done something wrong with the transfer, like not put enough of the old tank water in or something like that. My angelfishes seemed to be doing better. The next day, one of my angelfish was really struggling. I placed a digital heater in there and the temp read 68. The fish died. I currently have one fish that survived. I am disappointed. I need to purchase a different filter for the noise. I keep this in my classroom, so the noise is distracting the kids from focusing. ... show more
Reviewed in the United States on November 30, 2023 by Alexis
    • Broken filter, bad fake plants, 5 stars!!!
Color: Tetra Size: 20 gallon
Review Image by Jon Day Jon Day
So let me start with the bad. The thermometer is a plastic stip that doesn't work. The horrible plastic plants will hurt most fish. The filter was broken and sounded like a bunch of rocks were grinding inside it. And the light is a super basic on off. Now why you should buy this over all the other tanks. That's the tank and the price. The tank is a perfectly functional 20 gal fish tank. It has a nice lid. And I was surprised I liked the heater. All this for less than what a 20 gal fish tank without a lid would normally cost. Seriously just replace the stuff you don't like. The tank alone is worth the price. My tank has been set up for a month now. Photo attached. ... show more
Reviewed in the United States on March 10, 2025 by Jon Day Jon Day
    • Refused to help me. An so much broken and wrong
Color: Color Fusion Size: 20 gallon
Review Image by Richard Madaris Richard Madaris
Review Image by Richard Madaris Richard Madaris
Review Image by Richard Madaris Richard Madaris
Review Image by Richard Madaris Richard Madaris
Review Image by Richard Madaris Richard Madaris
Review Image by Richard Madaris Richard Madaris
I reached out to company by phone and their contact sheet. No response. Clamps broken on light. Light is wrong light for the tank. Doesn’t fit under the lid at all and can’t go on back of tank due to filter and can’t go on side of tank due to its to long for the side. It’s fully not what’s advertised at all on the lights or how to install at all. The material is flimsy for lid and lid and clamps to lid are broken on one side and lid is cracked. Was a birthday gift I got bc my birthday is this week. Can’t send it back bc I don’t have the box. Figured it would all be new and nothing broken. I even went out and bought new items and rocks and new filters and lucky bamboo to add next week. Just tried tonight to finally take it off the counter and look at it and try to see if I could get it ready to cycle. Noticed the crack in the lid first. Thought okay it’s fine. Won’t be a big deal but nope then notice the lights are not even the right lights for the tank at all. Like no comparison to what’s suppose to come with it. So now I have cracked lid and no lights at all. Not to mention two clamps were broken as well. One for lid and one for the light that doesn’t even fit this tank. So I stopped their and didn’t even bother to look at the rest. Just done and out 160 plus dollars for a twenty gallon tank that has no lid and no lights. I could have bought a 20 gallon at pet store for 20$ on sale for what I got for this. If I could give zero stars I would for lack of communication and failure to help ... show more
Reviewed in the United States on January 29, 2025 by Richard Madaris Richard Madaris
    • Great tank, hard to find replacement lights
Color: Tetra Size: 20 gallon
This is a fantastic tank. I purchased it in September 2022, and set it up in October. I haven't had any issues with it, and the same fish I bought then are still happy and healthy! As of today though (July 30th 2025) the light strip has started to flicker and shut off on its own. I have been looking for replacement lights, but the lights in this hood are very unique and I cannot seem to locate a replacement. After searching Amazon, customer reviews, the Web at large and the company site, I still haven't located this particular light strip. I did call and left a message with customer service as it's after hours over East where their headquarters are. I hope to hear back soon with some options, but am wondering if anyone has had to replace the light and may have other resources? ... show more
Reviewed in the United States on July 30, 2025 by Neon

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...