The Best 15 Gallon Fish Tanks for 2021


Shopping around for the best 15 gallon fish tanks is never easy. On the market, plenty of choices are available. Each with specific draw points and unique qualities. It can be confusing for a beginner to select which one can suit his or her needs and preferences. For this reason, we’ve outlined a buying guide that reviewed the top 6 15-gallon tanks to choose from and set up for yourself. Check them out and see which the right one is for you based on points, such as quick setup, colorful LED lights and nice design, to name some. If you’re ready, let us get started.

What is the Best 15 Gallon Fish Tank

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Top 6 Best 15 Gallon Fish Tanks Reviews

1. Hagen HG Fluval Flex 15 Gallon Aquarium Kit


The Flex Aquarium is our top choice for a small fish tank because it has an excellent design and can offer durability. The freshwater aquarium combines technology and quality. It is with an illumination and a multiple stage filter system. It also boasts a modern design, making it suitable for every design and décor.

If you would like to add life to your room, you’d love the adjustable LEDs and 48 shimmering lights included in the design of this tank kit. It also has a 7500K lamp that can encourage the growth and development of plants.

However, the Fluval Flex kit includes a shorter than expected hose, though. But still, it is one of the best freshwater tank kits on the market. It is durable and worth every cent. Check it out for yourself if these features sound great for you.


  • Easy to set up and maintain
  • Innovative design and engineering
  • Bright LED lights and lamp
  • Can add life to your room
  • Modern appeal and look


  • Short hose

2. Aqueon LED Aquarium Starter Kit Column Black 15 Gallon


The Aquarium Starter Kit looks cool and appealing. If you’re adding a nice focal point for your office or any room in your home, you might want to check out the starter kit. The 15-Gallon tank kit has a robust design, too. It is made compact so that it will not take up much space in a room.

The Aqueon kit is also with a square footprint, so it doesn’t take up much space. With this square shape, you can also maximize the space you have on your tabletop or anywhere you choose positioning this tank.

It also comes with inclusions, such as a thermometer, fish net, water conditioner, power filter and fish food.

On the downside, the tank is on the heavy side, though. But overall, I liked that its low profile and square shape. More than anything, it also doesn’t consume much space.


  • Square shape doesn’t take up much space
  • Bright LED lighting
  • Black, stylish and aesthetically pleasing
  • Florescent lighting hood
  • Complete kit for ease of installation


  • A bit heavy

3. Fluval 10531A1 SEA EVO XII 13.5 Gallon Aquarium Kit


The Fluval 10531A1 is another 15-gallon tank kit to check if you want a stylish and cool beginner’s kit that includes the things you need to set up. The SEA EVO XII Aquarium Kit is with a stylish honeycomb design. It allows the concealment of the filtration area. In that case, you can keep the aesthetic look and appeal of your tank.

It also offers a three-stage filtration that ensures complete filtering of the tank from the contaminants that would otherwise make your pets sick. It features biological, chemical and mechanical filtration media.

However, the water flow is restricted due to the debris trapped from the small slots. Overall, the kit is an excellent choice for its three-stage filtration, easy maintenance and convenient illumination.


  • Honeycomb style keeps filter out of sight
  • Convenient night/day illumination
  • Easy to maintain
  • Three-stage filtration steps
  • All-aluminum waterproof casing


  • Debris trapped from the small slots restrict water flow.

4. Coralife 16 Gallon LED Biocube Aquarium Starter Kit


The Biocube Aquarium is innovative, beautiful and elegant. It fits any room decoration and style. It is not hard to install, too, making it perfect for beginners who don’t have the experience in setting up a tank. The Coralife starter kit is also with a bright LED light that makes the aquatic environment even more appealing for the eyes.

I am also impressed with the natural day cycle lighting that this kit is designed with for added beauty in the tank. This tank also comes with an integrated filtration system that is easy to maintain. It also has a submersible pump and an adjustable return nozzle.

On the cons, its 24-hour timer might break in time, though. Overall, this kit is one of the best around for its easy and quick maintenance and its stylish appearance. It is also elegant and appealing to the eyes.


  • Innovative and stylish hood with LED
  • Customizable filtration
  • Quick and easy maintenance
  • Compact and stylish
  • Lighting can replicate natural day cycle


  • 24-hour timer might break in time

5. Fluval Vista Aquarium Kit 16 Gallon


The Fluval Vista Aquarium Kit is another beginner kit to consider for those who have just started in the fish keeping hobby. If you would like to improve the decoration of a room, you can also check out this kit that comes with a soft start lighting, improving its appearance.

The Fluval Vista is also chosen for its quick and easy maintenance, suitable for beginners. It also comes with a LED lamp that can replicate natural lighting. It is also ideal for freshwater tank and has a compact size to save space.

However, air pumps might splash the water and the light. But overall, the kit has a panoramic design and a cool overall built. Check it out if these features sound cool for you.


  • Panoramic design improves a room appearance
  • Simple and easy maintenance
  • Easy feeding door
  • Comes with a filter and soft start lighting


  • Air pumps can splash the light causing its malfunction

6. SeaClear 15 Gallon Acrylic Deluxe Hexagon Aquarium Combo Set


The SeaClear combo set is another consideration for beginners that want to start right with fish keeping. The combo set is easy to set up that doesn’t require complicated steps to get started.

It is also a durable acrylic tank that will last long. I also liked that the 15-gallon tank is with a hexagonal shape, so it does not take much space. The acrylic material is also tough that it can resist cracking and chipping, giving more value for the money for its long-lasting performance. This model is also perfect for either a freshwater or saltwater tank, adding to its value.

However, I do find that the light fixture can be a bit flimsy and that it needs improvement. But when it comes it the aesthetics, design and overall durability, I recommend this combo set.


  • Durable acrylic tank
  • Transparent and clear material
  • Can resist cracking and chipping
  • Easy set up for beginners
  • Impact resistant for longevity


  • Flimsy light fixture

15 Gallon Fish Tank Buying Guide

Just like other tank models, the 15-gallon tank is also available in a plenty of selection. For one, you can find models with LED lighting that replicates daylight, and others are with built-in filtration and pumps, to name some. So, with these said, you might feel overwhelmed with what to find on the market. Here is a guide to help you.

Filtration and other accessories included

It might be better that you choose a kit that comes with an integrated filtration to eliminate the need of buying one for yourself. In addition, it can be wise to buy a kit that comes with everything you need to set up. Some options even include fish food, pump and other things.


The durability of the tank matters, so it is best to choose one that can resist cracking and chipping. Acrylic might be better than glass in this regard. You can also read user reviews for ideas on durable fish tanks that can last a longer time than the others are. Sometimes, it also pays off to check the brand because some manufacturers prove better in ensuring the satisfaction of their customers with a quality and durable tank.

Design and shape

Some people want to buy the small tank for a focal point in their living room or any other room in their office or home. You can choose different shapes like square, rectangle, hexagon, honeycomb and others. Think about the right kind of shape to fit your preferences. For example, the square tank can take a smaller space. Others are with a honeycomb design for hiding the filtration at the back. Nevertheless, each design and shape have its unique qualities that make it different from the rest.

Fish type

It is also essential to think about the fish type to keep because some of them require less maintenance and others not. So, before buying a fish tank, which can come with a high startup cost, factor in the fish type you want in the tank.

What is a 15 Gallon Fish Tank?


It is a small tank, either a freshwater or a saltwater tank, that keeps small fishes, too. It is an ideal tank for beginners who have just started with the hobby of fish keeping. Unlike other tanks, it is easier to keep because it is smaller. For an idea on the top picks on the market, you can check out the above for the six excellent products on the market.

Types of 15 Gallon Fish Tanks

In terms of materials, the types of nano tanks are glass and acrylic. In terms of cost, glass is cheaper than the other is. It is why some people choose it over acrylic for a first tank.

Glass aquariums are also more common than acrylic, but it is harder to transport than acrylic is because it’s can be prone to chipping and cracking. Without even saying, the acrylic tank is more chosen by those looking for a long-term performance of their tanks.

However, glass can be the better choice for its scratch-resistance. The reason is that acrylic tends to scratch more easily than glass does. So, if you have pets or kids at home, you might want to pick a glass tank that can resist scratching better than an acrylic tank does. In terms of maintenance, acrylic can be more sensitive. You should use a safe scrubber for it.

In terms of weight, acrylic can be better because it is lighter than glass is. Thus, transporting it from one place to another or lifting it for that matter is easier, too. So, even with the water inside the tank, it is easier to move from one point of a home to another. The acrylic tank is easier to shape than glass is. In this case, you will find more shape options for the acrylic tank than with glass. It is easily moldable into almost any shape.

There you have some of the things to know about an acrylic and a glass tank so that you can choose and make a better decision later.

Why Do You Need 15 Gallon Fish Tank?

Take advantage of several benefits for buying a small tank like the 15-gallon capacity tank. Check out the following for an idea.

Less maintenance

One of the things that make a smaller tank of this size more advantageous than larger ones is due to the less maintenance they need. You don’t have to worry about a high upkeeping at all because there is less to maintain with a lower number of fish, too.


The small tank is beginner-friendly. You can get it set up in fewer steps than a larger tank is in addition to its less maintenance requirements. That is why you might want to consider it if you’ve just started with the fish keeping hobby.

Easier to set up

There isn’t much explanation needed here. The smaller the tank is not just easier to keep but also to set up. You might want to consider this small tank to eliminate any complicated process involved in the installation of the tank.

More affordable

Fish keeping can come with a high startup cost, but choosing a smaller tank like the 15-gallon one can greatly reduce it than picking a larger tank.

Nevertheless, the 15-gallon tank is yours if you’re a beginner that wants a simpler to set up and keep tank. It is also more affordable and newbie-friendly.

Frequently Asked Questions


How many fish in a 15 gallon tank?

To begin with, you can fit up to 15 fishes in the small tank. Then, you can go up to 20, as you improve in fish keeping. According to the experts, an inch of fish per gallon is the rule. It is an estimate that has been used for a long time. However, it also has its flaws because it didn’t take other things into consideration, such as filtration systems, lighting and fish types to keep. For example, a larger bodied fish can create more waste, so it needs more water. In this case, the one-inch of fish for every two gallons of water can be the safer guideline to follow.

What fish can live in a 15 gallon tank?

If you’re setting up this small tank, you might be thinking the kind of fish that can live in it. While the 15-gallon tank is small, it is versatile enough to accommodate different types of small fish.

However, you should not overstock the tank to avoid crowding and stressing the fish in it. You can refer to the previous answer for guidance on the number of fish to stock in the small tank while also accounting for the type of fish, filtration, substrate and other accessories in it. A few to consider include the tetras, guppies, barbs, danios and dwarf Corydoras. They are lovely and can add life and color to your tank.

How much does a 15 gallon fish tank weigh?

It depends on the material of the fish tank. For example, glass is heavier than acrylic is. But at the very least, a small tank of this capacity with dimensions of 24″ x 12″ x 12″ will weigh 21 pounds when empty and 170 pounds when filled.

Where to buy 15 gallon fish tank?

Places to buy include fish supplies stores in your community. You can also find them in online marketplaces, such as eBay and Amazon where to select from a broad range of choices.


There you have what to know about the best 15 gallon fish tanks that can help you get started in the fish-keeping hobby and do well at it. Again, when comparing your options for a small tank, think about the types of fish, design, construction and maintenance, among others. Also, select the tank with the features that you’re looking for it to have. Compare the top picks, each with the pros and cons, and select one that matches your needs and preferences. Finally, you can make a better decision and have a more satisfying purchase later. Buy the right 15-gallon aquarium today!

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