Aqueon vs Tetra Aquariums: Size, Setup and Parts
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Aqueon and Tetra both sell glass tanks and complete kits, and their listings put the tank size, the included parts and the footprint in different places. This page sets an Aqueon 20-gallon tank against a small Tetra 5.5-gallon tank, and adds the Aqueon 10-gallon kit and the Tetra 20-gallon kit. The figures come from each listing.
Size decides the first cut, and setup decides the second. A kit with a hood, filter and heater needs less shopping after delivery, but the listing still has to match the tank size you want. The parts list shows what is in the box and what must be bought separately.
Quick answer
For a bare glass tank at 20 gallons, the Aqueon 20-gallon long tank is the match. For a complete 20-gallon kit with a color LED, a heater and plants, the Tetra ColorFusion kit lists the same volume. For a smaller setup, the Aqueon 10-gallon kit includes the hood, filter and heater, and the Tetra 5.5-gallon tank is a tank only, with the hood and filter sold separately.
Listed figures side by side
| Listing | Tank volume stated | Dimensions stated | Item weight stated | Included parts stated |
|---|---|---|---|---|
| Aqueon 20 gallon long tank, B0H3MKJV7B | 20 gallons | 30.25 by 12.5 by 12.63 inches | 24.6 pounds | Tank only |
| Tetra 5.5 gallon glass aquarium, B08BJBYB4S | 5.5 gallons | 16 by 8 by 10 inches | 4.26 kg | Tank only; hood, filter and heater sold separately |
| Aqueon 10 gallon starter kit, B0DT1VKK9S | 10 gallons | 14 by 23.75 by 16.5 inches | 16.87 pounds | Tank, LED hood, filter, heater 50W, net, thermometer |
| Tetra ColorFusion 20 gallon kit, B013BXDXTC | 20 gallons | 27.88 by 16.13 by 20.38 inches | 34.3 pounds | Tank, hood, heater, filter, LED, plants, anemone |
The Tetra kit’s spec table lists only the aquarium as an included component, while its bullets describe the full kit. The detail section below covers that difference.
Aqueon 20 gallon long tank (B0H3MKJV7B)
Checked 2026-10-12. The spec table lists glass, a clear color, a 20-gallon volume, product dimensions of 30.25 by 12.5 by 12.63 inches, an item weight of 24.6 pounds, and freshwater and marine use. The listing gives a limited five-year warranty and names fish as the pet type.
No hood, filter or heater is included with this tank. The bullets give 34.0 by 16.2 by 17.0 inches and a net weight of 27.0 pounds, which differ from the spec table.
Tetra 5.5 gallon glass aquarium (B08BJBYB4S)
Checked 2026-10-12. The spec table lists glass, a modern style, an assorted color and a 5.5-gallon volume. It gives dimensions of 16 inches long, 8 inches wide and 10 inches high, and an item weight of 4.26 kilograms. The special feature is listed as lightweight.
The highlight states the tank size as 16 inches wide, 8 inches deep and 10 inches high, and says that the hood, filter, heater, lighting, decor and accessories are sold separately. The warranty is given as “see label”.
Aqueon 10 gallon starter kit (B0DT1VKK9S)
Checked 2026-10-20. The bullets describe a complete kit with a low-profile hood, cool white LED lighting and a feeding door, SmartClean internal filtration, an EcoRenew cartridge, a 50-watt preset heater that the listing says holds a constant 78 degrees, a thermometer, a fish net, premium fish food and a water conditioner. The spec table gives a 10-gallon volume and an item weight of 16.87 pounds.
The spec table lists the filter as size small and the cartridge as size medium. The bullets describe the 10-gallon glass rectangle aquarium, which matches the spec table for this listing.
Tetra ColorFusion 20 gallon complete kit (B013BXDXTC)
Checked 2026-10-20. The bullets describe a color-changing LED that can be paused on any single color, a set of anemones that sway with the filter current, and Tetra plants that the listing says come to life under the LED. The bullets list the kit contents as one 20-gallon glass aquarium, one aquarium hood, one UL heater, one Tetra Whisper 20 filter, one ColorFusion universal LED, two Wonderland plant multipacks and one blooming white anemone.
The spec table gives a 20-gallon volume, an item weight of 34.3 pounds, dimensions of 27.88 by 16.13 by 20.38 inches, and glass as the material. It lists the warranty as “see label / insert” and gives “Lightweight” as an additional feature. The included components field reads only “Aquarium”.
How these products were chosen
The Aqueon 20-gallon tank and the Tetra 5.5-gallon tank come from the saved research file for this keyword. The Aqueon 10-gallon kit and the Tetra 20-gallon kit were added as extras because each is a stated-volume aquarium from one of the two brands. All four are tanks or kits, so none was dropped on product type.
For a starting tank size, see which gallon tank a betta fish needs. For the parts and placement of a smaller kit, see a 10-gallon betta tank setup, and for the order of setup steps, see how to set up a betta tank.
Worked example: footprint and weight from the listed numbers
The Aqueon 20-gallon tank covers 30.25 by 12.5 inches in its spec table, about 378 square inches, while its bullets give 34.0 by 16.2 inches, about 551 square inches. The Tetra 20-gallon kit covers 27.88 by 16.13 inches, about 450 square inches, so the kit uses about 72 square inches more floor for the same listed volume. The bullet labels these as aquarium dimensions, so the listing does not confirm whether the hood adds to them.
Weight is the second check. The bare Aqueon tank lists 24.6 pounds and the Tetra kit lists 34.3 pounds, a difference of 9.7 pounds. That is arithmetic on the two listed figures. The listings do not show how the 9.7 pounds is split between the hood, filter, heater, plants and the glass.
Where the listings disagree
The Tetra kit gives “Lightweight” as an additional feature while its spec table lists 34.3 pounds. The same listing names only the aquarium as an included component, while the bullets describe a full kit with a hood, heater, filter, LED and plants.
The Tetra 5.5-gallon listing gives its tank size as 16 inches long and 8 inches wide in the spec table, and as 16 inches wide and 8 inches deep in the highlight. The dimensions are the same, but the labels differ.
What the listings do not say
The Tetra and Aqueon listings do not give the glass thickness. The Tetra kit does not give the wattage of its LED or the flow rate of its filter, and the Aqueon kit gives no flow rate for its SmartClean filter.
The Tetra kit lists “see label” for its warranty, which means the terms are not stated on the page. The Aqueon 20-gallon tank is the only item here with a stated term, which is five years and limited.
Frequently asked questions
Which listing has the largest tank volume?
The Aqueon 20-gallon long tank and the Tetra 20-gallon kit both list 20 gallons. The Aqueon 10-gallon kit lists 10 gallons, and the Tetra 5.5-gallon tank lists 5.5 gallons.
Does the Tetra 5.5 gallon tank include a hood?
No. The highlight states that the hood, filter, heater, lighting, decor and accessories are sold separately.
Which kit includes a heater and a filter?
The Aqueon 10-gallon kit includes a 50-watt preset heater and a SmartClean filter. The Tetra 20-gallon kit includes a UL heater and a Tetra Whisper 20 filter.
Is the Tetra 20 gallon kit lightweight?
The spec table gives the item weight as 34.3 pounds and also lists “Lightweight” as an additional feature. The listing does not explain how both fit together, so the weight figure is the one to rely on.
Which listing should I check before buying?
Check the volume, the footprint and the included parts for the exact item. For the Tetra kit, confirm whether the aquarium is the only item in the box, since the spec table names only the aquarium.
Conclusion
The Aqueon 20-gallon tank is the bare option at the same volume as the Tetra kit, and, by its spec table, it takes less floor space. The Tetra 20-gallon kit lists the hood, heater, filter and plants that the Aqueon tank does not include, and it takes more floor space and weighs more. The Aqueon 10-gallon kit is the smallest complete setup here, and the Tetra 5.5-gallon tank is the smallest tank with no equipment included.
