120 Gallon Terrariums

Ashley Harmon
10 min readJun 14, 2024

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Welcome to our roundup of the best 120 Gallon Terrariums available in the market! If you’re looking for a spacious home for your reptiles or amphibians, we’ve got you covered with our top picks that are both stylish and functional. Get ready to explore and find your perfect terrarium for your pets!

The Top 7 Best 120 Gallon Terrariums

  1. Symton Reptile Terrarium: Sturdy 120-Gallon Tank for Bearded Dragons & More — The Symton Reptile Terrarium, a 120-gallon tank, offers a spacious and bioactive environment for your pets, with sturdy PVC construction, temperature regulation, and easy cleaning features.
  2. 120 Gallon High Terrarium with Cabinet for Reptiles — REPTIZOO 120 Gallon High Terrarium with Cabinet — Perfect Iguana Enclosure with Adjustable Partitions, Stable Structure, and Convenient Cable Openings for Easy Set-Up.
  3. Extra Large 120 Gallon Reptile Terrarium for Thermal Gradient Support — The REPTIZOO 120gallon Extra Large Reptile Terrarium offers a premium reptile habitat with optimal viewing, hygiene, and temperature control for a thriving reptile environment.
  4. OiiBO 120-Gal Large White Tempered Glass Reptile Terrarium — Provide your pet reptile or amphibian with a large, high-quality tempered glass terrarium, featuring a rimless design, secure lid, and hygienic ease for optimal care and viewing.
  5. 120 Gallon Wooden Reptile Terrarium with Adjustable Partitions — The Repti Zo 120gallon Wooden Terrarium is a top-quality choice for reptile enthusiasts, featuring adjustable partitions, convenient cable openings, and a stylish, durable design perfect for any decor.
  6. Extra Large 120 Gallon PVC Reptile Enclosure Terrarium — This 120 gallon PVC terrarium from Repti Zoo offers advanced heat preservation, moisture resistance, and practical ventilation for your reptile pets, while being easy to clean and maintain for a hassle-free experience.
  7. Large 120-Gallon Reptile Terrarium Organizer — Organize your reptile terrarium with the 120 Gallon OiiBO Terrarium for a cleaner, more presentable living space.

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Reviews

Symton Reptile Terrarium: Sturdy 120-Gallon Tank for Bearded Dragons & More

The Symton Reptile Terrarium offers the perfect space for your reptile friend to hang out. With its tall, clear substrate barrier, maintaining layers of bioactive substrate is a breeze. Plus, the thick PVC walls and doors provide excellent heat and moisture retention, while rounded edges ensure safer handling. Stack these enclosures together with the purchase of additional parts for more versatility.

Unfortunately, this terrarium may not be the most durable one out there. Some customers have reported issues, such as damaged edge pieces, bent screws, and flimsy side panels. Additionally, the instructions aren’t the best, making assembly a bit of a challenge. However, for the price, it’s a decent enclosure, especially for those new to reptile keeping. The terrarium features sturdy handles, easy slide doors, and good ventilation, making it a suitable option for several reptile species.

120 Gallon High Terrarium with Cabinet for Reptiles

Boost your reptile sanctuary with the REPTIZOO 120 Gallon High Terrarium, specially made for housing various species of iguanas. Its adjustable partitions and height make it convenient for any size home, while the sturdy black moisture-proof structure ensures durability.

Store all your reptile necessities with ease thanks to the cable openings and air vents at the back panel. Assembling this terrarium is a breeze and it suits different decor styles, making it a versatile piece to complete your reptile enclosure.

Extra Large 120 Gallon Reptile Terrarium for Thermal Gradient Support

This 120-gallon reptile terrarium by Reptizoo is a must-have for your reptilian companion. Its extra-large size provides ample space for your pet to explore and thrive comfortably, while the black finish adds a sleek and modern touch to any room. It’s particularly suitable for humid conditions, ensuring your reptile stays clean and healthy.

The glass construction maintains the ideal heat gradient, ensuring your pet remains comfortable and healthy. The terrarium’s design allows your pet to move between different heat zones, just like in the wild, providing a natural and stimulating environment for your reptile.

OiiBO 120-Gal Large White Tempered Glass Reptile Terrarium

Living with a reptile can be a rewarding experience, but providing the ideal habitat can be challenging. That’s where the OiiBO 120-gallon Large Tempered Glass Reptile Terrarium comes in handy. Made of durable glass, this terrarium offers a great view of your pet while keeping their home hygienic and easy to clean. The rimless design adds a modern touch, while the secure, anti-escape lid ensures your scaly friend stays safe and sound.

One of the features I appreciated the most was the ability to maintain the right heat gradient for your reptile’s well-being. It’s crucial, and this terrarium does an excellent job at retaining the right temperature. However, assembling it can be a bit time-consuming, and the price tag might be on the higher side for some. Overall, the OiiBO Large Tempered Glass Reptile Terrarium is a solid choice for providing a comfortable and practical home for your pet reptile or amphibian.

120 Gallon Wooden Reptile Terrarium with Adjustable Partitions

The Yellow Repti Zo 120-gallon Wooden Terrarium is a top-notch choice for reptile enthusiasts. It boasts a stable structure crafted from black moisture-proof material, ensuring that your pet’s environment remains both functional and attractive. The terrarium comes equipped with adjustable partitions and can be heightened to suit your reptile’s needs.

Furthermore, this versatile terrarium is perfect for storing various items and can be easily customized to fit different decoration styles. The back panel offers convenient cable openings and air vents, making wiring a breeze.

Assembly is a breeze, and with a 5.0 rating and one review, it’s clear that customers are thrilled with their purchase.

Extra Large 120 Gallon PVC Reptile Enclosure Terrarium

I have been using the REPTI ZOO 120 Gallon PVC Reptile Enclosure Terrarium for a few weeks now, and let me tell you about my experience. First of all, the heat preservation on this PVC enclosure is fantastic compared to traditional glass or wooden enclosures. It’s like having a little sunny corner for your reptile friends, even in cold weather!

The PVC material is also a huge plus. It’s exceptionally moisture-resistant, perfect for high humidity environments where your reptiles might need a cozier space with less chance of mold or mildew. The removable glass sliding door is a convenient feature for easy cleaning and feeding, making my life much simpler.

The detachable mesh screen vent at the top makes a great difference too. It allows for plenty of airflow while letting in UVB and IR light, creating a comfortable and breathable home for your reptile pets. Cleaning has been a breeze as well, since the enclosure is straightforward to maintain.

Overall, this REPTI ZOO enclosure has been a game-changer for my household. The PVC material offers optimal temperature and humidity regulation, while the added convenience of features like removable doors and vents make it a no-brainer for a reptile lover.

Large 120-Gallon Reptile Terrarium Organizer

I recently came across the OiiBO 120 Gallon Terrarium and it has been a game-changer for my reptile’s home. This terrarium not only gives my reptile ample space to roam but also adds an element of neatness to my living room. The thoughtful design of the OiiBO makes it easy to organize all the necessary components, such as the food, water, and heating sources.

One feature that stood out to me was its sleek and modern aesthetic — it’s not just functional, but also visually appealing. However, I did notice that the terrarium could be slightly larger, providing my reptile with even more space. Overall, the OiiBO 120 Gallon Terrarium has been a fantastic addition to my home and one that I highly recommend.

Buyer’s Guide

Selecting the perfect 120-gallon terrarium to house your reptile or amphibian can be an exciting task. However, it is essential to consider several factors before making your purchase. This buyer’s guide aims to provide you with general advice and essential features to think about when purchasing a 120-gallon terrarium. By the end of this guide, you will be well-equipped to make an informed decision that best suits your needs.

Size and Space Requirements

When selecting a 120-gallon terrarium, it is crucial to consider the space requirements of your pet. Ensure that the terrarium has enough room for them to move around, hide, and stretch. Remember that animals need some space to feel comfortable and secure. Also, consider if any additional accessories like ramps or platforms will be required to fill the available space.

Material and Construction

The material and construction of the terrarium are essential factors to think about. A sturdy and well-built terrarium should be your priority. Look for terrariums made of acrylic, glass, or mesh, each with its pros and cons. Acrylic terrariums are lightweight and less prone to breaking, while glass terrariums provide excellent visibility. Mesh terrariums offer better ventilation, but it’s crucial to find one with a strong, rust-resistant frame.

Heat and Lighting

Reptiles and amphibians have specific heat and lighting requirements. A 120-gallon terrarium will need a suitable heating system and light source to maintain an optimal temperature. Consider the type of heating system (e. g. , under tank heaters, heat mats, or ceramic heat emitters) and the wattage of the lamp needed for your pet. Also, consider the placement of the light and heating element within the terrarium to ensure it provides adequate coverage without causing discomfort to your pet.

Maintenance and Cleaning

Regular maintenance and cleaning are vital aspects of owning a terrarium. A 120-gallon terrarium will require a significant amount of cleaning to keep it in top condition for your pet. Choose a terrarium with removable front panels for easy access and cleaning. Consider the type of substrate and bedding material needed for your pet. Make sure to choose a material that is easy to clean, eco-friendly, and safe for your pet.

FAQ

What is the ideal size for a 120 gallon terrarium?

The ideal size for a 120 gallon terrarium is typically 4 feet in width, 2 feet in height, and 8 feet in length. However, it is always best to consult with a vet or experienced terrarium owner to ensure the right dimensions for your specific needs. These dimensions provide adequate space for the animals or plants to move around and grow. The depth ensures there is enough substrate, while the width and length allow for appropriate decorations and hiding spots.

Regardless of the dimensions, the key factor is providing a spacious enough environment for your animals or plants to thrive. Make sure your terrarium meets the dimensions and requirements for your species of interest and that there is enough light, temperature, and humidity control to maintain a healthy environment.

Are there any materials I should avoid when building a 120 gallon terrarium?

Certain materials should be avoided when building a 120-gallon terrarium, as they may pose a risk to the health of the animals or plants inside. Avoid using metal or non-porous materials for substrate, as the lack of porosity makes it difficult for water to be absorbed and retained, which can cause problems with humidity and temperature levels.

Instead, wood or coconut fiber substrates are recommended. These materials enable the container to function as a moisture reservoir, helping regulate the humidity levels and maintaining a stable temperature. They also offer a natural surface for animal feet or plant roots to grip onto and provide the necessary habitat for all types of reptiles or amphibians.

How do I maintain the terrarium at the right temperature and humidity levels?

Maintaining the correct temperature and humidity levels is crucial for the health and well-being of the animals or plants inside your 120-gallon terrarium. To achieve this, use a combination of heat lamps, heat tape, and under-tank heaters. Heat lamps are typically placed near the thermometer and the hot end of the terrarium, while under-tank heaters help maintain the temperature at the bottom and can also aid with humidity.

For humidity control, use a humidity gauge and make adjustments as necessary. Mist once or twice daily to maintain humidity levels within the acceptable range. Additionally, use a humidity dome or terrarium tent to create a more humid environment for tropical reptiles or amphibians. Regularly monitor and adjust the factors mentioned above to ensure a comfortable living environment for your pets or plants.

What types of animals can I house in a 120 gallon terrarium?

A 120-gallon terrarium provides ample space for a variety of animals, including reptiles, amphibians, and insects. Some popular options include: snakes, geckos, Uromastyx lizards, turtles, and salamanders. It is essential to research the specific needs of the animals you plan to house to ensure the terrarium meets their species-specific requirements for space, temperature, and humidity.

Moreover, it is always recommended to maintain a separate dietary and sanitation space for each herbivore, carnivore, and insect. This approach will create an ideal living environment, making sure that you don’t inadvertently mix specific diets or fecal matter that may cause infections or diseases between different species.

What types of plants can I grow in a 120 gallon terrarium?

A 120-gallon terrarium provides ample space for a variety of plants, including carnivorous plants, bromeliads, orchid plants, and tropical plants that typically require elevated humidity. Some popular options include Venus flytraps, sundews, pitcher plants, carnivorous plants, and many ferns and mosses that thrive in humid environments.

Selecting the right type of plant is important, as it should be compatible with the environmental conditions and animals housed in the terrarium. Most plants require a suitable medium composition, water, and light exposure to remain healthy, so it is essential to choose a specialized plant substrate that matches the specific needs of each plant. Ensure that the terrarium remains moist but not overly damp to provide an ideal growing environment for your plants.

How much does a 120 gallon terrarium cost?

The cost of a 120-gallon terrarium depends on the material it is made from and the details of the design. Glass and acrylic terrariums tend to be higher priced, with an average of around $300 — $500, depending on shape, size, and decorative features. Custom-made terrariums are typically more expensive, ranging from $500 — $1,000 or more depending on the materials, design, and complexity of the build.

If you’re on a budget, consider purchasing a pre-assembled 120-gallon terrarium kit or an aquarium in the same dimensions, which can save you up to 50% compared to purchasing a custom made one. Alternatively, you can build one yourself using wood or acrylic materials and specialized fittings, which can further reduce the cost.

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