Best 15 Gallon Fish Tanks (Reviews + Buyer’s Guide)

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Are you setting up a new fish tank but don’t know how to choose the brand that best matches your needs?

If yes, you are at the right place! In this article, you will know some of the best 15-gallon fish tanks in today’s market. Are you ready? Let’s begin!

A list of the Best 15-gallon Fish Tank in the Market

1. SeaClear 15 Gallon Hexagonal Fish Tank

SeaClear 15 Gallon Hexagonal Aquarium
SeaClear 15 Gallon Hexagonal Fish Tank

Are you searching for a modern and high-quality 15-gallon fish tank? Don’t look further than this hexagonally shaped tank!

Once installed, SeaClear Hexagonal Fish Tank will be the center of attraction in your home. With its unique and stylish design, it would not be hard to see your fish from a wide variety of angels.

What makes it popular is its 12 inches light fixture and reflector. If you have been using an inefficient or poor-quality tank, SeaClear is one of the brands you can trust.

When it comes to materials, SeaClear Hexagonal Fish Tank is made of acrylic. Yes, it is not only lightweight but also strong enough to withstand the test of time. Equipped with other special materials, this tank is a bit similar to a glass tank.

One chief concern of most homeowners is chipping or cracking tanks. Don’t worry! This latest version from SeaClear will take your experience to the next level. It is also perfect for residential properties with playful kids and pets.


  • It has more rounded corners, making it safer than you have ever imagined.
  • Available with three background options.
  • It would be fun to add your own heater and filter as well.


  • There’s no removal lid.
  • It doesn’t have an actual bulb.

2. Coralife LED Biocube 15-gallon fish tank

Coralife LED Biocube Aquarium LED
Coralife LED Biocube Aquarium LED

When selecting the best fish tank, you have different factors in mind. Aside from durability, you consider the style.

But not all tanks are sturdy and aesthetically pleasing. The long wait is finally over with Coralife LED Biocube Tank.

It is not only impact-resistant but also stunning. With its unique style and appeal, it fits in any modern home.

Just like the SeaClear, Coralife is available with filtration, LED lighting, and a pump. It is also competitively priced that won’t break your bank.

The integrated lighting, on the contrary, is on a 24-hour timer. That’s not all! There are three different settings you can enjoy, and these include color enhancing, bright white, and sparkling blue.

Aside from a 24-hour timer, the lighting has a 30-minute sunset or sunrise function. What else? It has a 60-minute moonset and moonrise function. This means it replicates the natural environment of fish.

How about the filtration system? Well, it is customizable and compact, located on the back of the tank. The pump is submersible with an adjustable return nozzle and dual intakes.


  • A well-made and top quality tank
  • Easy to set up. There are instructions you can follow.
  • The rear part of the tank has three chambers


  • Expensive but worthwhile
  • Tricky to lean, especially in some areas.

3. Lifegard Aquatics Crystal Fish Tank

Lifegard Aquatics Crystal Aquarium
Lifegard Aquatics Crystal Fish Tank

Another best fish tank is Lifegard Aquatics Crystal Fish Tank. Many people are amazed at its 45-degree angle cut edge. Aside from the fascinating look, it is capable of providing a sleek and comfortable viewing experience.

Lifegard Aquatics Crystal Fish Tank also has a concealed rear filter, making it popular in today’s market.

A favorite choice for beginners, the pros start to love this brand as it only requires a simple setup procedure compared to other excellent alternatives.

More than the convenient and stress-free installation, it requires less intensive maintenance. It only needs a bottom drain and plug, which can be done within a minute or two. It is user-friendly and perfect for those who are less tech-savvy.

Created with the adjustable directional flow, Lifegard Aquatics Crystal Fish Tank is available with a built-in 3 phase filtration system. It particularly has a rear filter with a long-lasting pump.


  • It does not require complicated installation. You can get the process done as easily as possible.
  • The maintenance is suitable for those who have a hectic schedule.
  • The directional flow is easy to adjust.


  • Some customers complain about the packaging.
  • It is not available with a LED lighting unit.

4. biOrb Halo 15-gallon Fish Tank with MCR Lighting

biOrb Halo 15 Aquarium with MCR Lighting
biOrb Halo 15-gallon fish tank with MCR Lighting

Are you planning to take good care of a betta but are unaware of what Fish Tank to use? biOrb Halo 15 Aquarium with MCR Lighting is a stylish tank you should consider today.

Available in different sizes, biOrb Halo 15-gallon with MCR Lighting is a flexible option for everyone. Its design is superb. Shaped like a sphere, it is ideal for those who have limited space.

Despite most fish tanks being made of glass, this tank from biOrb is packed with acrylic. Unlike traditional tanks, it is lighter and more compact than you have expected.

What else? It comes with a five-stage filtration system. It includes stabilization and oxygenation. So, you can say bye to any buildup of dirt without hassles.

Another thing is the LED light. It is not only long-lasting but also functional.


  • It is easy to control the color, enabling you to avoid unnecessary efforts.
  • It comes with a maximum of 16 preset options.
  • It is easy to choose the level of brightness according to your requirements.
  • Beautiful and aesthetically pleasing style.
  • The tank is slightly distorted, making the fish look bigger.


  • The filter current is too strong.
  • It is sometimes challenging to clean.
  • You need to buy other accessories.

5. GloFish 15-gallon Fish Tank Kit

GloFish 15 Gallon Fish Tank Kit
GloFish Fish Tank kit with LED Lighting and Filtration Included

While it is not as popular as the other fish tanks in this list, don’t underestimate the functionality and design of the GloFish Fish Tank Kit. It is sturdy, long-lasting, and stylish.

Whether you’re looking for a feature-packed or durable option, this fish tank won’t be a disappointment.

Its installation is another advantage you should not miss. There’s no intensive list of tools to utilize. Any prior experience is not relatively necessary.

If there’s something unclear in the installation, there’s an instruction manual you can use. It composes of a step-by-step process that would make your job easier than ever.

Customer support is incredible, as well for something you might want to ask or verify, SeaClear has one of the best customer representatives whom you can rely on and trust.


  • Available at a competitive rate to enjoy quality features.
  • It allows you to get fish variety.
  • It comes with medium eco bags and a microfilter.
  • It can level up the aesthetic value of your space.
  • It is of good quality.
  • It was developed with LED lights you can find on the arm lamp.
  • It is made of acrylic and other special materials.


  • Some accessories are not available.

Factors to Consider when Buying the Best 15-gallon Fish Tank

You have done some research on the best 15-gallon fish tank. How was your experience? It’s confusing as there are many options. But there’s nothing to worry about! This section will show some important selection pointers you should consider. Read on for more information!


Buying a fish tank without accessories can be a big problem. You have to search for different accessories before you can use your tank. The trick here is to pick a kit. Make sure it has integrated filtration. Then, find out if it has pumps and other necessary accessories.


Construction is the next factor to take into account. While it is enticing to choose the cheapest option, it is helpful to select the brand that can withstand chipping and cracking. Instead of glass, acrylic is a better material you deserve. To be confident with your shopping decision, it is worthwhile to read some reviews online. While it is tedious and time-consuming, all of your efforts would pay off at the end of the day.

Shape and Design

Fish tanks are available in different shapes. Popular designs include rectangle, square, honeycomb, and hexagon tanks.

Square Fish Tank is good for those who have limited space. Brands with a honeycomb design can hide the filtration perfectly.

What’s your choice? Before you make a decision, determine your needs beforehand.

Fish Type

What kind of fish do you want to take good care of? While being an ignored aspect when searching for the best 15-gallon fish tank, don’t do the same thing. Think about the type of fish you like to have at home. If you have friends with prior experience, don’t be ashamed to ask for some assistance.

Popular Types of 15 Gallon Fish Tanks

Popular Types of 15 Gallon Fish Tanks

While there are many types of fish tanks, the most common solutions are glass and acrylic. Which is better? Keep reading for further details!

Glass Fish Tanks

A glass fish tank is a go-to option for many because of the cheaper cost. Yes, it is more affordable than acrylic, making it one of the best solutions for those who are on a tight budget.

When it comes to availability, glass fish tanks are more common. You can find one in the nearest store and even online.

However, it is more difficult to transport as the risks of getting chipped and cracked are higher than expected.

Acrylic Fish Tanks

An acrylic tank, on the contrary, is a different case. Due to its durability, it can last for years without constant repair or even replacement. It does not chip or cracks as easily as glass fish tanks.

But wait, there’s more! An acrylic tank is lighter and more compact, so it would be convenient to transport it directly to your doorsteps.

Why Should You Invest in a Quality 15 Gallon Fish Tank?

It is Convenient to Maintain

If you have a hectic schedule, a difficulty to maintain a fish tank would be a headache. A reliable 15-gallon fish tank, on the other hand, does not require intensive maintenance. Due to its size, you can get rid of the dirt within a few minutes or less. This saves your time and avoids other unnecessary efforts.

Perfect for Beginners

It is tempting to take advantage of large fish tanks as a beginner. But it is not advisable. As a starter, 15-gallon fish tanks and other small tanks will be a good investment. When you are ready and experienced, you can consider larger tanks.

It Won’t Cause a Dent in Your Savings Account

Generally, fish keeping or maintenance is costly. However, you can save some cash in many ways. Using a smaller tank like a 15-gallon fish tank will be a bright idea.

The Setup can be Done Within Minutes

More than the bigger savings and less intensive maintenance, 15-gallon fish tanks are fun and simple to install. You can get the process done like a pro in a minute or so. If you have something to ask or verify, the instructions manual is helpful. Alternatively, you can contact the company to fix your problem right away.

An Excellent Choice for a Limited Space

Whether you’re planning to install a fish tank or have limited space, a 15-gallon fish tank is a perfect solution. It does not only enhance the aesthetic appeal of your room, but it also saves your space.

Common Equipment for a 15 Gallon Fish Tank

Equipment for a 15 Gallon Fish Tank

If you are a beginner, you might be wondering what are accessories needed to install and use in a 15 gallon fish tank.

Well, there’s a bunch of accessories you should not forget.

Of course, filters are a must, keeping the water clean all year round. How do filters work? First, they get rid of larger waster particles. Second, they convert the nitrites or ammonia into nitrates. Lastly, they get rid of organic pollutants according to the standards.

Apart from filters, the lighting units are the second most necessary accessories you should have.

Both plants and fish need enough light, so artificial lighting systems can play a critical role in making all living organisms in the tank as healthy as possible.

Similar to filters, lighting units come in different types, including incandescent bulbs and LED strip lighting.

If you experience a hard time making a decision, LED lighting is a go-to option because it is full spectrum. This means your fish and plants in the fish tank would receive the most natural light.

If you already have filters and lighting units, don’t forget to purchase a heater. In case your fish are cold-water species, a heating system might not be necessary.

For tropical fish, a heater can make a big difference. You can choose in-line, substrate, or submersible heaters.

Other accessories and equipment include a thermometer, algae magnet, filter media, water conditioner, water test kit, fishnet, bucket, driftwood, gravel, rocks, caves, and more.

How to Set Up a 15 Gallon Fish Tank?

Perhaps, you have watched video tutorials on how to set up a 15-gallon fish tank on YouTube. It looks easy. But once your tank arrives and is ready for installation, you might find the process stressful. These are simple tips you can follow:

  • Decide Where to Set Up the Tank – A fish tank can be installed anywhere except in places with so many heat sources and direct sunlight. Also, the area should be easy to access for your comfort.
  • Wipe the Tank – After that, it’s time to wipe your fish tank with a smooth cloth or warm water to get rid of dust and other dirt particles.
  • Add Necessary Accessories – Once dust or dirt is removed, add the important accessories to the tank, including a thermometer, filter, lights, and heater.
  • Fill it With Water – After the installation of accessories, fill the tank with enough water. Then, position available decorations and plans. Next, add a de-chlorinator to make the water safe. That’s it! There’s no complicated procedure to follow.

What are the Types of Fish You Can Keep in a 15 Gallon Tank?

Choosing a fish for your tank can be tricky, so determine whether or not they need the same water conditions.

Common options are guppies, platyfish, tetras, dwarf corydoras, danios, barbs, nerite snails, cherry shrimp, Amano shrimp, and more.

Frequently Asked Questions 

How many fish can a 15-gallon tank accommodate?

Small tanks can accommodate a minimum of 15 fishes. After some time, you can add another 5 fish. The rule of thumb is an inch of fish per gallon.

How many does a 15-gallon tank weigh?

Well, there’s no standard weight for a 15-gallon fish tank. The material used in the tank can make a tank lighter or heavier than ever.

A glass tank, for example, is heavier compared to acrylic.

Measuring 24 x 12 x 12, a small tank weighs around 21 pounds when empty. When filled with water and accessories, it weighs 170 pounds.

Where to purchase a quality and affordable 15-gallon tank?

15-gallon fish tanks are highly accessible due to the high demand of the public. While the official websites of manufacturers are the go-to option, you can visit popular eCommerce platforms, including Amazon and eBay. There are also other reliable fish supplies stores you can depend on.

Other alternative sizes:

Final Verdict

So, what’s your thought? Before choosing a 15-gallon fish tank, determine your requirements in advance. It would help make the selection process less stressful than ever.

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