Best 20 Gallon Fish Tanks (2024 Update)
If you’re looking for a new fish tank, one size to consider is a 20 gallon tank. This size is perfect for those looking to start a small aquarium or add to their existing collection. However, before making any purchases, there are certain factors to consider that will determine the best fish tank for your needs.
The first thing to consider is what type of fish you plan on keeping. Different species of fish have different requirements when it comes to tank size, water conditions, and equipment. Research the fish you want and their specific needs before making a decision. Another important factor is the tank’s filtration system. Ideally, you want a filter that will provide adequate water flow and oxygenation for your fish.
Finally, ask yourself some questions when selecting a 20 gallon fish tank. Do you prefer a glass or acrylic tank? Do you want a tank with a stand or a tabletop model? Would you like a tank with LED lighting or would you prefer to purchase lighting separately? Knowing the answers to these questions will help you choose the best 20 gallon fish tank for your home.
In summary, selecting the best 20 gallon fish tank comes down to understanding what type of fish you plan on keeping, the filtration system, and your tank preferences. Take time to research, ask questions, and make an informed purchasing decision.
10 Best 20 Gallon Fish Tanks
| # | Product Image | Product Name | Product Notes | Check Price |
|---|---|---|---|---|
|
1
|
 |
Ideal for filtering and maintaining a clean environment for small to medium-sized aquariums up to 30 gallons.
|
|
|
|
2
|
 |
Ideal for filtering water in small aquariums with a maximum capacity of 20 gallons.
|
|
|
|
3
|
 |
The product is ideal for elevating and supporting a 20-gallon aquarium, providing stability and a stylish appearance to any room.
|
|
|
|
4
|
 |
The product is ideal for keeping the water temperature stable and safe for fish in 10-20 gallon aquariums.
|
|
|
|
5
|
 |
It is an ideal filter for small aquariums with a capacity of 5 to 20 gallons.
|
|
|
|
6
|
 |
Ideal for providing ultra-quiet aeration and biological filtration in small fish tanks ranging from 5 to 20 gallons.
|
|
|
|
7
|
 |
This product is ideal for filtering fresh and saltwater aquariums that hold 15-20 gallons of water.
|
|
|
|
8
|
 |
This product is ideal for maintaining the temperature of freshwater and marine aquariums between 5-20 gallons.
|
|
|
|
9
|
 |
The product is ideal for setting up a medium-sized aquarium, with a clear acrylic material and a combo set.
|
|
|
|
10
|
 |
The product is ideal for maintaining the water temperature in aquariums to ensure the wellbeing of aquatic creatures.
|
|
1. Aqueon Quietflow 20 Led Pro Aquarium Fish Tank Power Filter For Up To 30 Gallon Aquariums
The aquarium's water quality is a crucial factor in promoting the health and well-being of aquatic creatures. Therefore, it is essential to have an efficient filtration system that can get rid of harmful particles and toxins to maintain a clean and safe environment for fish to thrive.
This aquarium filter boasts a dense floss that effectively removes particles and debris from the water. With activated carbon, it can also eliminate toxins, odors, and discoloration, leaving the water crystal clear and odor-free. The patented bio-holster plays a pivotal role in removing toxic ammonia and nitrites, which can be hazardous to fish.
Additionally, this filter features a diffuser grid that effectively removes additional toxins while simultaneously adding oxygen to the water, promoting more active fish. The diffuser grid also minimizes splashing, making the return exceptionally quiet, which is an excellent feature for aquarium owners who prefer a peaceful environment.
2. Aqueon Quietflow 10 Led Pro Aquarium Fish Tank Power Filter For Up To 20 Gallon Aquariums
The Aqueon QuietFlow LED PRO Aquarium Filter is the perfect addition to any fresh or saltwater aquarium up to 20 gallons. This filter boasts a self-priming filter pump that will automatically start or restart in the event of an interruption in power. The internal pump design helps to dampen noise and eliminate leaks with the added benefit of a self-priming feature.
The QuietFlow LED PRO Aquarium Filter provides mechanical, chemical, biological, and optional additional specialty pad filtration to ensure the optimal dissolved oxygen content for healthier, more active fish. It has high flow rates to promote the best possible environment for fish to thrive.
This filter has a built-in LED indicator light that flashes when water cannot pass through the cartridge, indicating it's time to change the cartridge. It uses One Medium Aqueon Replacement Cartridge and Size 10 Specialty Filter Pads.
It is important to note that when replacing the cartridge, the Bioholster should not be cleaned, as it contains beneficial biological bacteria that are necessary for maintaining a healthy aquarium.
3. Imagitarium Newport Wooden Tank Stand – For 20 Gallon Aquariums
The fish tank deserves a sturdy and stylish stand that can complement its beauty. The Clean Modern Design Fish Tank Stand is a perfect match for your aquarium as it offers a sleek and modern appearance that can enhance the overall look of your room.
Assembling the stand is a breeze with its easy-to-follow instructions, and you can have it set up in no time. The stand's adjustable protective nylon leveling feet ensure that your fish tank stays level and stable, preventing any accidental spills or mishaps.
With a size of 24.75 inches in width, 12.75 inches in depth, and 30.25 inches in height, this stand can easily accommodate a 20-gallon fish tank. The stand can hold up to 180 pounds of weight, ensuring that your tank and all its accessories are well-supported.
4. Hitauing Led Fish Tank Heater.
The Hitauing Aquarium Heater 100W is the perfect solution to maintaining a stable water temperature for your marine and freshwater fish tanks, turtle tanks, betta tanks, small ponds, and more. With a length of 5.9" and voltage of 110-120V, this aquarium heater is designed for tanks ranging from 10 to 20 gallons.
Safety and durability are at the forefront of the design of this fish tank heater. The components used are encased in a high-durability ABS shell, and the nickel-chromium heating wire and quartz glass are made of high-temperature resistant materials. The explosion-proof quartz sand adds an extra layer of safety and durability, making this product a reliable choice for your aquatic pets.
The Hitauing Aquarium Heater also features two intelligent protectors to prevent damage to both the product and its circuitry. The first protector is an over-max temperature warning, which automatically stops heating when the temperature reaches 94℉/34℃. The second protector is an off-water warning, which automatically stops heating when the submersible aquarium heater is not submerged underwater.
The digital display temperature control system allows you to monitor the water temperature and set the desired temperature in real-time. The variable temperature settings range from 63-94℉/17-34℃, and you can switch between Fahrenheit and Celsius by pressing and holding the button for 3 seconds. Each press changes the temperature by ±1℉. When heating, the red light is on, and when the temperature is stable, the green light is on.
At Hitauing, customer satisfaction is a top priority. As a brand seller, they provide a 2-year warranty service from the date of purchase. If you encounter any issues with the submersible water heater, their customer service team is ready to assist you and help solve any problems you may have.
5. Aquaclear 20 Power Filter, Fish Tank Filter For 5- To 20-Gallon Aquariums
The aquarium filtration system is a must-have for any fish enthusiast. It offers superior contact time with filter media and an energy-efficient pump, which lowers operating costs. The installation process is quick and easy, making it a hassle-free experience. To ensure maximum operation and efficiency, it is recommended to clean the aquarium filter every two weeks.
This filtration system provides optimal mechanical, chemical, and biological filtration, ensuring that the water quality is top-notch. It comes equipped with AquaClear Foam, Activated Carbon Filter, and BioMax and Cycle Guard, which work together to offer superior water quality.
The filtration volume of this aquarium filter is up to seven times larger than comparable fish tank filters, making it a powerful tool for maintaining a healthy and clean aquarium. Its efficient design ensures that the water is properly filtered, removing any harmful elements and leaving the aquarium water clean and clear.
6. Ultra Quiet Sponge Filter For Small Fish Tanks
The AQQA Aquarium Sponge Filter is a highly effective and ultra-quiet air-powered filter that provides exceptional filtration without causing any disturbance to your fish. The package does not include an air pump or air hose, so it is essential to select an appropriate air pump based on your tank size.
This sponge filter provides both mechanical and biological filtration. The vertical pattern design of the sponge filter increases the filtering area and helps to filter efficiently. The bio ceramic media balls provide biological filtration, breaking down harmful substances and cultivating beneficial nitrifying bacteria simultaneously.
The filter sponge and bio ceramic media balls are both replaceable, making it easy to remove the sponge for cleaning or replacement. The package includes two sponges in total. The bio ceramic balls are also washable and reusable, or you can replace them with other filter media as per your requirements.
The AQQA sponge filter is a multi-functional aquarium filter that combines filtration, aeration, and water circulation in one. It helps to keep your fish tank crystal clean and provides an excellent living environment for your aquarium inhabitants.
This sponge filter is perfect for use in a breeding fry tank, shrimp and betta fish tank, freshwater and marine tank. The small filter is suitable for 5-20 gallon tanks, while the medium filter is suitable for 20-110 gallon tanks. It is important to squeeze the sponge repeatedly until it is full of water so that the filter can sink to the bottom of the aquarium.
7. Crystalclean Ugf For 15-20 Gallon Tanks
Introducing the Clear-Free Premium Under Gravel Filter, the perfect solution for maintaining a clean and tidy aquarium with minimal effort. This air-driven filter utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium while keeping a crisp and neat look inside. Its simplistic design means less "moving parts," making maintenance a breeze. The Clear-Free Premium Under Gravel Filter is suitable for most 15 – 20 (high) gallon aquariums.
This filter provides biological, chemical, and physical filtration. As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
In addition to filtering your aquarium, the Clear-Free Premium Under Gravel Filter also aerates your tank. This air-driven system not only filters but also provides aeration, making it a filter and bubbler in one!
The Clear-Free Premium Under Gravel Filter comes with all the necessary items for installation. The package includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
When it comes to measurements, each Filter Plate separately is 11.25” (W) x 11.2” (D), and the Filter Plates together measure 22.5” (W) x 11.2” (D). Each Lift Tube at the Filter Plate Base measures from 12” – 15”. With its compact size and efficient design, the Clear-Free Premium Under Gravel Filter is a must-have for any aquarium enthusiast.
Investing in the Clear-Free Premium Under Gravel Filter means investing in the health and cleanliness of your aquarium. Its air-driven system provides both filtration and aeration, making it a convenient and efficient option for maintaining crystal clear water in your tank. With its simplistic design and easy maintenance, the Clear-Free Premium Under Gravel Filter is a must-have for any aquarium owner.
8. Submersible Aquarium Heater For 20 Gal Tanks
Introducing the Submersible Heater, a must-have for any aquaculture enthusiast or aquarium hobbyist. This product is designed to keep your fish and plants in optimal condition by providing a regulated temperature range of 68 °F to 93 °F (20-34 °C) for 5-20 gallon tanks.
The heater can be easily fixed on the tank wall with 2 adjustable suction cups, making it a convenient and versatile addition to your aquarium. The temperature can be adjusted by simply rotating the knob, with a slight deviation of ±3 °F.
Safety is a top priority with the Submersible Heater, as it features an indicator light that turns red during operation and automatically shuts off when the set temperature is reached. Additionally, the product includes a protective cover to keep your fish safe from overheating.
The Submersible Heater is made of 2 mm extra thick quartz glass, ensuring durability and resistance to electric leakage. Its iron-chromium heating wires are specially designed for fast heating to warm your tank quickly.
With a built-in thermostat, the Submersible Heater can automatically regulate and maintain the water temperature at the desired level. The extra thermometer sticker is also included, allowing you to monitor the water temperature at any time.
9. Seaclear 20 Gal Acrylic Aquarium Combo Set, 24 By 13 By 16", Clear
Looking for an aquarium that is not only durable but also visually stunning? Look no further than the SeaClear acrylic aquarium combo.
This combo includes an acrylic aquarium, reflector, and electrical 15" light fixture, providing everything you need to get started. The acrylic aquarium is not only clearer than glass, but it is also 17 times stronger while only being half the weight. This means that it is more impact-resistant and less prone to chipping or cracking than glass, making it a safer choice around children and pets.
The SeaClear acrylic aquarium is safe for both saltwater and freshwater environments, allowing you to create the aquatic habitat of your dreams. Once you have set up your aquarium, you will be amazed at how your fish and decorations will pop when viewing them through the crystal-clear acrylic.
Invest in the SeaClear acrylic aquarium combo for a durable, visually stunning, and safe aquatic environment for your fish and other aquatic creatures.
10. Tetra 26446 Ht Submersible Aquarium Heater With Electronic Thermostat, 100-Watt,multicolor
The Tetra HT heaters are an essential tool for any fish enthusiast seeking to maintain their aquarium's optimal temperature. These heaters come equipped with indicator lights that change color to signal whether the device is off, heating up, or has reached the desired temperature. The red light indicates that the heater is warming up the water, while the green light signals that the water has reached its ideal temperature of 78° F, perfect for most tropical fish.
The HT20 model is particularly impressive since it features a built-in electronic thermostat that automates the process of regulating the water temperature. This means that no manual adjustments are required, as the electronic thermostat continuously monitors and adjusts the temperature as needed. This feature is especially convenient for busy individuals who may not have the time to monitor their aquarium's water temperature regularly.
The Tetra HT heater is designed to work best for aquariums that range in size from 10 to 30 gallons and have hoods or glass canopies. The device is fully submersible and can be installed either vertically or horizontally, depending on the user's preference. Moreover, its small footprint allows it to be conveniently concealed behind plants or other decorative elements in the aquarium.
It is essential to read all the label information upon delivery to ensure proper installation and usage of the Tetra HT heater. To prevent any electrical hazards or accidents, it is crucial not to plug the heater into an electrical outlet until it has been placed inside the aquarium.
Best 20 Gallon Fish Tanks FAQs
Are there any 20 gallon fish tanks that are specifically designed for certain types of fish?
Yes, there are 20 gallon fish tanks that are specifically designed for certain types of fish. Depending on the species of fish you want to keep, you may need a tank with specific features such as a certain shape, filtration system, lighting, and temperature control.
For example, if you want to keep tropical fish like tetras, guppies, or angelfish, you will need a tank with a heater to maintain a water temperature between 75-80°F. You may also need a filtration system that can handle the bio-load of multiple fish and provide adequate oxygenation.
If you want to keep a betta fish, you will need a tank with a gentle filter and a lid to prevent the fish from jumping out. Betta fish also prefer still water, so a filter with adjustable flow is ideal.
Other types of fish like goldfish require a larger tank with powerful filtration and a lower water temperature. Therefore, a 20 gallon tank may not be suitable for goldfish.
It's important to research the specific needs of the fish you want to keep and choose a tank that can provide a suitable environment for them.
Are there any 20 gallon fish tanks that are suitable for both freshwater and saltwater habitats?
Yes, there are 20 gallon fish tanks that are suitable for both freshwater and saltwater habitats. However, it is important to note that the process of converting a freshwater tank into a saltwater tank requires careful consideration and planning.
Firstly, the tank must be thoroughly cleaned and any equipment used in the freshwater tank must be replaced or properly cleaned to avoid cross-contamination. The type of fish and other marine life that can be kept in the tank must also be carefully selected, as some species are more sensitive to changes in water conditions than others.
Additionally, a protein skimmer, live rock, and a high-quality salt mix will need to be added to the tank to maintain the proper water chemistry for saltwater fish.
It is recommended to consult with a professional aquarium specialist or do extensive research before attempting to convert a freshwater tank into a saltwater tank.
What are the advantages of a 20 gallon fish tank over a smaller or larger tank?
A 20-gallon fish tank is a popular choice for beginner and experienced fish keepers alike. One of the main advantages of a 20-gallon fish tank over a smaller tank is that it provides more space for your fish to swim and grow. This means that you can keep a larger variety and number of fish in the tank without overcrowding them.
A 20-gallon fish tank is also easier to maintain than larger tanks. It requires less water changes and cleaning compared to a larger tank, which can be time-consuming and expensive. Additionally, a 20-gallon tank is a manageable size for beginners who are just starting out in the hobby.
On the other hand, a 20-gallon fish tank may not be suitable for larger fish species that require more space to swim. In this case, a larger tank would be necessary. Conversely, if you have limited space, a smaller tank may be more appropriate.
Overall, a 20-gallon fish tank strikes a good balance between size, ease of maintenance, and the number and variety of fish that can be kept.
What are the best features to look for in a 20 gallon fish tank?
When choosing a 20 gallon fish tank, there are several features to consider that will ensure a healthy and happy environment for your aquatic pets.
Firstly, it is important to look for a tank with a good filtration system. A filter will keep the water clean and remove harmful toxins and waste products. It is recommended to choose a filter that is suitable for a 40 gallon tank, to ensure adequate filtration for your 20 gallon tank.
Secondly, the material of the tank is important. Glass is a popular option as it is durable, scratch-resistant, and provides clear viewing. Acrylic is another option that is lightweight and shatterproof, but it can scratch more easily.
Thirdly, consider the lighting system. A good lighting system can promote plant growth and enhance the colors of your fish. LED lighting is a popular option as it is energy-efficient and long-lasting.
Lastly, consider the overall design of the tank. A well-designed tank will provide ample swimming space for your fish and allow for easy maintenance. Look for tanks that have a flat base and are easy to clean.
Overall, when choosing a 20 gallon fish tank, prioritize the filtration system, material of the tank, lighting system, and overall design to ensure a healthy and happy environment for your aquatic pets.
What are the most common fish species that can be kept in a 20 gallon fish tank?
A 20 gallon fish tank is a relatively small aquarium and there are several fish species that can thrive in it. One of the most popular species is the neon tetra, which is a small, colorful and peaceful fish that can live in groups. Another great option is the platy fish, which are also small and come in a variety of colors. They are easy to care for and can coexist with other peaceful fish. Guppies are another common species that can be kept in a 20 gallon tank. They are known for their vibrant colors and active personalities. Other options include the dwarf gourami, the cherry barb and the corydoras catfish. It is important to note that even though a 20 gallon tank may seem spacious, it can quickly become overcrowded if too many fish are added. Therefore, it is crucial to choose fish that are suitable for the tank size and maintain a healthy environment for them.
What are the most important factors to consider when selecting a 20 gallon fish tank?
When selecting a 20 gallon fish tank, there are several factors to consider to ensure the health and happiness of your aquatic pets. First and foremost, you should consider the size and type of fish you plan to keep. A 20 gallon tank can accommodate a small community of fish, but certain species may require more space or specific water conditions. It is important to research the specific requirements of the fish you plan to keep before making a purchase.
Another important factor to consider is the filtration system. A good filtration system will help to maintain the cleanliness and quality of the water, which is crucial to the health of your fish. You should also consider the type of lighting and heating system you will need, as well as the overall design and aesthetic of the tank.
Finally, it is important to consider your own level of experience and availability for maintenance. Some tanks may require more maintenance than others, and it is important to choose a tank that you feel comfortable caring for. By considering these factors, you can select a 20 gallon fish tank that will provide a healthy and happy environment for your aquatic pets.
What are the top-rated 20 gallon fish tanks on the market?
There are several top-rated 20 gallon fish tanks available in the market that offer great features and durability. One of the most popular options is the Fluval Spec III Aquarium Kit, which is a compact tank equipped with a powerful circulation pump and an efficient 3-stage filtration system. It also comes with an LED lighting system, making it an ideal choice for both novice and experienced fish keepers.
Another great option is the Aqueon Aquarium Fish Tank Starter Kit, which includes a 20-gallon glass tank, LED lighting, a heater, and a QuietFlow filter. This starter kit has everything you need to get started with fishkeeping and is also an affordable option.
The Tetra 20 Gallon Complete Aquarium Kit is also a highly recommended option. It includes a 20-gallon tank, an LED hood, a heater, a filter, and a water conditioner. This aquarium kit is easy to set up and maintain, making it perfect for beginners.
Other notable options include the MarineLand Portrait Glass LED Aquarium Kit, the Penn Plax Curved Corner Glass Aquarium Kit, and the SeaClear Acrylic Aquarium Combo Set. These tanks are durable, stylish, and offer excellent features that make them some of the best 20-gallon fish tanks on the market.
What is the best type of filter for a 20 gallon fish tank?
When it comes to selecting a filter for a 20-gallon fish tank, there are various options available in the market. However, the best type of filter for a 20-gallon fish tank is a hang-on-back (HOB) filter. HOB filters are easy to install and maintain, and they do not take up much space inside the tank. They work by drawing water from the tank, passing it through a filter media, and then returning the clean water back to the tank.
One of the benefits of HOB filters is that they offer adequate filtration for a 20-gallon tank without causing any disturbance to the fish. They are also effective in removing debris, uneaten food, and harmful chemicals from the water, which helps to maintain a healthy environment for the fish. Additionally, HOB filters are affordable and widely available in the market.
Overall, HOB filters are the best type of filter for a 20-gallon fish tank due to their efficiency, ease of use, and affordability. However, it's essential to choose a filter that meets the specific needs of your tank and fish species.
Which 20 gallon fish tanks are suitable for beginners?
When it comes to choosing a 20-gallon fish tank for beginners, there are plenty of options available in the market. The ideal fish tank for beginners should be easy to set up, maintain and should provide a comfortable and healthy environment for the fish.
One of the most popular options for beginners is the Aqueon Aquarium Fish Tank Starter Kit. This kit includes a 20-gallon tank, a filter, a heater, a LED light, and a fishnet. It also comes with a setup guide and a fish food sample. This kit is a great option for beginners as it includes everything required to start a basic aquarium.
Another good option is the Tetra 20 Gallon Aquarium Kit. This kit includes a 20-gallon tank, a filter, a heater, a hood with LED lights, and a fishnet. The kit also includes a setup guide and a water conditioner sample. It is a good option for beginners as it is easy to set up and maintain.
Lastly, the Marina LED Aquarium Kit is another good option for beginners. This kit includes a 20-gallon tank, a filter, a heater, a LED light, and a fishnet. This kit also includes a setup guide and fish food samples. It is a great option for beginners as it is easy to set up and maintain.
In summary, the Aqueon Aquarium Fish Tank Starter Kit, Tetra 20 Gallon Aquarium Kit, and Marina LED Aquarium Kit are all great options for beginners looking for a 20-gallon fish tank.
Which 20 gallon fish tanks have the best lighting options?
When it comes to 20 gallon fish tanks, there are several options that offer great lighting. One popular choice is the Fluval Spec III Aquarium Kit, which includes an LED light that provides bright and efficient lighting for the tank. Another great option is the Aqueon LED Aquarium Starter Kit, which also comes with an LED light that provides excellent illumination. For those looking for a more customizable lighting option, the Finnex Planted+ 24/7 Aquarium LED Light offers a range of settings that can be adjusted to simulate natural daylight cycles and enhance plant growth. The Current USA Satellite Freshwater LED Plus offers similar customization options, with the added benefit of a remote control. Ultimately, the best lighting option for a 20 gallon fish tank will depend on the specific needs of the tank's inhabitants and the owner's personal preferences.
