5 Best 20 Gallon Turtle Tanks Of 2023 For Your Pet

Turtles are easy to handle pets, but they need care and good habitat for their survival in captivity. As turtles are semi-aquatic animals, they spend their time equally in water and land. If you are planning to own a baby turtle, you have to create a proper habitat for your pet and get a turtle tank. 

It can be challenging for a beginner turtle owner to get the right size turtle aquarium for their pet. The water tank should hold 10 gallons of water per inch of the turtle’s shell size, so they can get enough space in the tank to swim. In my opinion, a 20 gallon turtle tank is sufficient for baby turtles in their small size, and I came up with 5 good turtle tanks with 20-gallon capacity. 

List Of Top 5 Best 20 Gallon Turtle Tanks Are The Following: 

Tetra Deluxe Aquatic Turtle Kit 

Tetra Deluxe Aquatic Turtle Kit


  • Brand: Tetra
  • Dimensions: 33.93 × 15.81 × 17.69 inches (L × W × H)
  • Weight: 41.44 Pounds
  • Material: Glass
  • Style: Modern

Are you looking for a water tank where your little baby turtles can swim and bask? Luckily, Tetra Deluxe Aquatic Turtle Kit is an excellent terrarium you can buy for your pet. It comes with a 20-gallon glass tank, making it a suitable option for young turtles.

The kit features a screen top and two heat lamps, providing your little reptile the proper ventilation and warmth required. I like this aquatic turtle tank 20 gallons because it is incorporated with a dome that gives your turtle turtles a suitable environment where they can bask. 

Amazingly, if you are just starting to raise a turtle, I suggest this 20 gallon turtle tank starter kit because it comes with food and water product samples. It helps you understand how to take care of your turtle. 

The water filter in the terrarium comprises a decorative repto-filter, which efficiently cleans the water using three-stage filtration. Its large intake holes prevent the filter from clogging, along with covers that keep the turtles away from it.


  • Equipped with two dome heat lamps 
  • Three-stage filtration technology
  • Ideal for aquatic turtles
  • Modern style 


  • A bit expensive
  • Heavy

Our Verdict

Tetra Deluxe Aquatic Turtle Kit will provide your pet with a perfect environment where they can feel secure and comfy. Your turtle will surely enjoy the beautiful waterfall and relaxing basking spot of this terrarium. It is a great aquatic turtle tank kit with two dome heat lamps because little turtles feel cozy warmth inside.

Aqueon LED Aquarium Kit

Aqueon LED Aquarium Kit


  • Brand: Aqueon
  • Dimensions: 24.25 × 12.5 × 19.5 inches (L × W × H)
  • Weight: 33 Pounds
  • Material: Glass
  • Style: Frustration-Free Packaging

Aqueon LED Aquarium Kit is an all-around small turtle tank kit with almost everything you need to set up an indoor aquatic habitat for your turtle. It includes a fine glass water tank, thermometer, submersible preset heater, QuietFlow power filter, and setup guide. 

From years of turtle keeping, I learned that the quality of water carries the load when it comes to turtle’s health. The QuietFlow Power Filter in this 20 Gallon Turtle Tank Kit cleans all types of water waste using 5-stage filtration technology.

It has carbon inside to eliminate the nitrates and nitrites to sustain the natural water cycle. Interestingly, the filter is equipped with a red LED light to indicate it is time to change the cartridge. You only have to drop in the cartridge to clean to keep the turtle tank clear. 

Turtles do not swim if the water temperature is not between 72 to 78°F (22 to 25°C). For this, it comes with a small preset heater which will maintain the water temperature at 78°F (25°C), so your turtle can relax in the cozy water. You will get a thermometer with the kit to frequently check the water temperature. 

With a low-profile LED light that sits on top of the aquarium, this 20 gallon turtle tank brings the water habitat to life. It did not come with a basking platform, so you have to use it separately along with heat lamps to provide your turtle with adequate UVB rays for its development.


  • With a built-in LED lighting system 
  • 5-stage filtration technology
  • Affordable Price 
  • Preset heater to keep the water temperature optimal


  • Do not have onboard heat lamps 
  • It did not come with a basking platform

Our Verdict

Aqueon LED Aquarium Kit is perfect for you if you are in search of an aquarium where you can raise little turtles along with fish. The rectangular shape of the Turtle Aquarium Kit gives aquatic turtles enough room to swim and relax. The basking platform and heat lamps are not included in this kit, so you need to buy them separately.

Perfecto Manufacturing 20-Gallon Tank

Perfecto Manufacturing 20-Gallon Tank


  • Brand: Perfecto
  • Dimensions: 1 × 1 × 1 inches (L × W × H)
  • Weight: 1 Pound
  • Material: Glass
  • Style: Long Profile

The Perfecto Manufacturing 20-Gallon Tank is a great tank for beginners who want to get their feet wet in the world of aquariums. The tank has a beautiful design, which makes it look like a piece of art. It also comes with glass lids that are easy to clean and maintain.

The tank has an acrylic base, resistant to scratches and dents. It also has an integrated air pump that provides your turtle with enough oxygen, while maintaining good water circulation within the tank.

This best 20-Gallon Turtle Tank is easy to set up and use, even for beginners. It is made from high-quality materials that can last for years without problems. The only downside is that this tank does not have accessories for maintaining or setting up your turtle’s environment.

The tank has everything you need to start, so it is simple to set up. The lid has an alarm system to notify you when the water level gets too low or high. Only downside of an aquarium is that it does not come with any live plants, so you will have to buy them separately. 


  • Easy to Set Up
  • Small Footprint 
  • Long lasting quality 
  • It has long profile


  • No LED light, substrate, and basking area

Our Verdict

As a 20-gallon tank, the Perfecto Manufacturing Tank with Glass Lids is great for turtle owners just starting out. The tank is made from high-quality materials that ensure durability and reliability over time. The integrated air pump allows you to maintain good water circulation within the tank while maintaining adequate oxygen levels for your turtle.

Tetra 20 Gallon Complete Aquatic Kit 

Tetra 20 Gallon Complete Aquatic Kit


  • Brand: Tetra
  • Dimensions: 27.88 × 13 × 16 inches (L × W × H)
  • Weight: 34.1 Pounds
  • Material: Glass
  • Style: Modern

Tetra 20 Gallon Complete Aquatic Kit is for quality aquatic habitat for your turtle. Compared to acrylic, glass turtle tanks are prone to scratches, but this aquatic turtle kit 20 gallon is scratch resistant, so it is great for you if you place this turtle tank on the spot where it can get scratches.

Clean water is what turtles need to grow well. It offers a whisper filter to ensure your pet remains healthy and enjoys a bath. Unlike other filters for 20 gallon turtle tanks, it does flawlessly clean the water without making any noise. Turtles do not like to stay in a noisy place, so it will keep your turtle calm.

No aquarium can replicate the natural water habitat for turtles because water resources like lakes, rivers, and ponds have plants. This 20 gallon aquatic turtle kit by tetra comes with artificial plants to give turtles the experience of wilderness. You can put these plants on the boxwood plant mat that is included in the kit.

You do not have to spend extra for buying an aquarium heater because it features Tetra Mini UL Heater. To keep the water temperature optimal, you buy a thermometer. As turtles like to go into the water in the daytime, this turtle tank kit has an LED hood to provide the daytime effect.


  • Includes Safety Certified Mini Heater
  • Artificial water plants
  • Scratch resistant glass
  • Reasonable price


  • No basking platform for turtles
  • You will have to buy gravel separately

Our Verdict

This Tetra Turtle Tank offers everything you need for your turtle to survive. Its whisper filter offers purified water, and its photosynthetic effect will keep your turtle tank plants alive. I would highly recommend this tank to anyone with a turtle or even just someone interested in getting a new pet.

SeaClear Acrylic Aquarium Combo Set 

SeaClear Acrylic Aquarium Combo Set 


  • Brand: SeaClear
  • Dimensions: 24 × 13 × 16 inches (L × W × H)
  • Weight: 20 Pounds
  • Material: Acrylic
  • Style: Impact Resistant

SeaClear Acrylic Aquarium Combo Set is the perfect terrarium for your turtle as it comes with an acrylic water tank, a 15-inch electric light fixture, and a reflector. I am sure you want your turtle aquarium to last for years to come, but it is only possible if you get a durable aquarium like the one that comes with this 20 gallon turtle kit. 

You should consider purchasing if the quality is what you want. As this 20 gallon turtle tank is made up of acrylic rather than glass, so you can expect it to resist scratches and blows that a glass tank can not. 17 times stronger than a standard glass tank, it will last for a long time.

You never face the leakage problem because this acrylic tank has chemically sealed tight seams. Interestingly, it is clearer than any glass aquarium out there, which allows you to enjoy watching your turtle swimming, basking, and relaxing inside.

You will not get light in this turtle tank kit 20 gallons, but it comprises a 15-inch electric light fixture in which you can put in a separately purchased tube light. Apart from that, the light reflector included in the package makes sure that the light does not scatter and completely lightens the water tank for the turtle.


  • Lightweight 
  • Incredibly stronger 
  • It gives a super clear display 
  • Resistant to breaking


  • Quite Porous 
  • Expensive

Our Verdict

SeaClear Acrylic Aquarium Combo Kit comes with a crystal clear acrylic turtle tank made to absorb the impact more than an ordinary glass tank. You need to buy accessories like a basking platform, heater, filter, and UVB separately, making it an expensive option on the go. I will recommend this turtle aquarium kit if you do not want to compromise on quality and have a solid budget.

What To Consider When Buying A 20 Gallon Turtle Tank?

Turtles are some of the most popular animals in the pet industry. They are easy to keep and care for, making them perfect for any beginner. Before you get your turtle, it is important to ensure you have everything ready. Following are some factors you need to consider when buying a 20 gallon turtle tank, including:


Turtles are cold-blooded animals, and they require temperatures between 75-80 degrees Fahrenheit (24-26 degrees Celsius). If you live in an area that does not have these temperatures or if you are planning on keeping your turtle outside, then check out some heaters which can be placed inside their habitat or outdoors, depending on where they live.

Water Quality

When it comes to turtle tanks, water quality is one of the most important factors to consider as turtles expel too many wastes in the water in the aquarium, which indicates that it will get dirty after some time. If you want to keep turtles as pets, then the water in your tank should be clean so that they do not get sick from poor water quality.


Turtles need a source of UVB rays for proper vitamin D3 production and egg laying, so it is important to provide lighting during the day in order to replicate natural conditions. If you keep your turtle indoors, then make sure there is no glass blocking the UVB light bulbs because this can cause calcium burn issues.

Filtration System

A good filtration system will remove excess nitrates from the water and keep it clean of debris that could harm your turtle. There are many different types of filters available, including gravity systems, under gravel filters, and top mounted filters, which all vary in price range based on quality and size of system needed. 

Basking Area

The basking area is where your turtle will spend most of its time. It should be large enough to allow access to all sides of the tank but not so large that the water level is too low. The basking area should be at least 1/3 of the total depth of the tank. The larger the volume, the more surface area there will be, but the larger the volume of water, the longer it will take for your turtle to become accustomed to its new home.

What Turtles Can Live In A 20 Gallon Tank?

Turtles require a 10-gallon water tank per inch of their size. It is a rough estimate, but it is a good starting point to figure out what tank size you need. Here are some common turtles for 20 gallon tanks:

Green Sea Turtles

These turtles can live in about an 8-gallon tank with plenty of room for them to swim around. It is also known as “cute” and “turtle.” They are shy creatures, so you will want to keep them in an area where they feel safe.

Blue-Ringed Octopus

These octopuses can reach up to 20 inches long and will require at least an 18-gallon tank for them to feel comfortable. They are active creatures that enjoy looking at things from above the water line, so you will want to provide them with plenty of hiding places for them to explore as well as hiding places for you.

Box Turtles

These turtles are small enough that they do not need much room at all. Usually, around 7 gallons is enough space for one box turtle, but there have been reports of them living in smaller tanks as well. They love hiding places and make great pets if you have time for them.

How To Clean A 20 Gallon Turtle Tank?

Turtle tanks are a great way to keep your turtle healthy and happy. However, they can get dirty over time. If you want to keep your turtle tank clean and maintain its health, here are some tips on how to clean a 20 gallon turtle tank:

Step 1:

Make sure the water is always clean by doing regular water changes. Every two weeks or so, you should change about 25% of the tank’s water with fresh water. You can use a simple siphon pump or an aquarium aerator if you are using a larger tank.

Step 2:

You need to remove any old decorations and supplies from the tank. This will help prevent bacterial growth in your turtle’s environment. If there is an issue with bacteria growth, then it may cause problems for your turtle, such as respiratory infections or skin problems like ulcers or fungus infections.

Frequently Asked Questions (FAQs)

Final Words

No doubt turtles are cute pets and easy to handle. They just need a proper habitat if you want to keep them healthy and save them from any harm. A turtle container (tank) is the best option for a pet turtle as it can live and swim in it forever.

The best size of a turtle tank depends on the age, size, and species of the pet. A 20 gallon water will be sufficient for baby turtles or those with 1 to 2 inches shell size. I have listed some good 20 gallon turtle tanks with awesome features.

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Hey, I've done my Ph.D. in Marine Biology. I'm a turtle enthusiast and have been owning turtles for the last 22 years and dedicated to sharing my experience to help you in pet turtle upbringing.