15 Gallon Fish Tank: Buying Guide & Best Setup Ideas

A 15 gallon fish tank would be ideal for you if you’re just beginning to learn about keeping fish and searching for the perfect starting tank that is suitable for beginners, you should consider it as a great size to start with.

It lets you keep a few fish, and really comprehend water chemistry, and what is required to look after fish before moving to larger tanks.

A tank of this size is suitable for novices but it is also able to use by experienced aquarists to breed or biotope tanks.

15 Gallon Fish Tank Dimensions

A best 15 gallon fish tank measures 24 x 12 x 12 inches. But, they are available in a variety of sizes and shapes depending on the type of tank you’re looking for.

You can pick a large 15-gallon aquarium that is typically 20 x 10 x 18 inches.

While empty, these tanks weigh about 20lbs as opposed to 170lbs when they are full.

Top 7 Best 15 Gallon Fish Tanks

In this guide, we look at the best tanks to choose from, provide some ideas for stocking your fish, and, finally, describe how to choose the best equipment to keep your fish well.

SeaClear 15 gal Deluxe Hexagon Acrylic Aquarium Combo Set, 15 by 15 by 20', Cobalt Blue
SeaClear 15 gal Deluxe Hexagon Acrylic Aquarium Combo Set, 15 by 15 by 20", Cobalt Blue
Combo includes aquarium, reflector and electrical 12" light fixture; Tranquil Hexagon design; You won't believe how your fish and decorations will pop!
Tetra ColorFusion Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
Tetra ColorFusion Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
The anemones sway with your filter current and give your fish a place to hide and relax; Tetra plants come to life under the glow of Color Fusion LED
biOrb CLASSIC 60 Aquarium with LED - 16 gallon, Black
biOrb CLASSIC 60 Aquarium with LED - 16 gallon, Black
Constructed Out of Acrylic- 10 times stronger than glass, 50% lighter and 93% clearer; Low Voltage – All biOrb aquariums operate from a 12V Transformer
Fluval Vista Freshwater Aquarium Kit, 16 Gallon
Fluval Vista Freshwater Aquarium Kit, 16 Gallon
16 US Gal (60.5 L) glass aquarium with panoramic, bent-glass design

Last update on 2024-05-08 / Affiliate links / Images from Amazon Product Advertising API

In the middle of the 10-gallon and a 20-gallon aquarium, a 15 gallon fish tank for your fish remains as a smaller aquarium.

The majority of beginner setups in local pet stores are 10 gallons but the 15-gallon size is more suitable for novices.

The extra space gives you greater flexibility with water chemistry. Most people don’t know that the bigger tank is, the easier you can keep water within the tank steady.

This tank is ideal for experienced aquarists who are seeking an inexpensive tank that could be used as a backup in the event of an emergency, as an emergency treatment tank to treat sick fish, or as a quarantine tank for fresh fish prior to joining the current setup.

It’s also the ideal size for a breeding set-up for fish keepers who want to take their hobby to the next step.

The tanks are available in a variety of shapes and sizes Some tanks are small and tall, while others are tall and short. The most effective tanks for the majority of species of fish in the 15-gallon tanks are those with the biggest footprint.

Because of the dimensions of these tanks, They are ideal for smaller areas in your home or office.

Best 15 Gallon Fish Tanks Reviews

1. Best Value Starter Aquarium Kit: Fluval Flex 15 Gallon Aquarium Kit

Best 15 Gallon Starter Kit

Fluval Flex 15 Aquarium Kit - Fish Tank for Fish & Plants - Comes with LED Lights, Filtration System & More - 16" x 15" x 15" - 57 L, 15 Gal. - Black
  • Stylish Fluval Aquarium: Contemporary design with curved front and...
  • Customizable LED Aquarium Lights: Fully adjustable 7500K White + RGB...
  • Powerful Fluval Fish Tank Filtration: 3-stage filtration with...
  • Perfect Pet Supplies: Fish tank enclosure with multi-directional dual...
  • Innovation for Fish Keepers: Fluval innovates to foster a sustainable...

Last update on 2024-05-08 / Affiliate links / Images from Amazon Product Advertising API

This sleek kit includes all the items you require to set up your own aquarium ideal for an experienced or beginner aquarist.

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This elegant aquarium features a unique curved front, which lets you observe all the fish and plants easily. With black trim along the base, edges, and the top, it’ll be a perfect fit for any modern-day home.

It has an LED lamp, which is perfect for encouraging an increase in the size of a diverse variety of plants. It will increase the hue of the fish. This lamp’s LED lights can be controlled via remote control and set to various colors. There are also several cool effects like the faded cloud and lightning.

The kit comes with an efficient filtration system that will handle the tank’s chemical, biological mechanical, and chemical filtration requirements.

Aquarium dimensions: 16(W) x 15(D) x 15(H) inches.


  • Plenty of space in the back of the house for you to install your own heater.
  • 15 different settings for lighting that can be adjusted with a dimmer to recreate their natural setting.
  • Elegant and stylish design, with a high-bowed front.
  • The filtering system is superb.


  • The black background doesn’t work for any fish.
  • The intake vent is quite wide which means that small fish can pass through.
  • It’s not simple to alter the lighting if you wish to change the lights.
  • The hood is flimsy and has a feeling to it.

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2. Unique Aquarium: SeaClear 15 Gallon Hexagonal Aquarium

Best Unique 15 Gallon Tank

SeaClear 15 gal Deluxe Hexagon Acrylic Aquarium Combo Set, 15 by 15 by 20", Cobalt Blue
  • Combo includes aquarium, reflector and electrical 12" light fixture
  • Tranquil Hexagon design; You won't believe how your fish and...
  • Acrylic aquariums are clearer than glass, 17 times stronger, and only...
  • More impact resistant and less prone to chipping or cracking than...
  • Safe for Salt or Freshwater

Last update on 2024-05-08 / Affiliate links / Images from Amazon Product Advertising API

If you’re seeking a tank that is different from the norm, this hexagonally-shaped aquarium is the ideal choice.

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This unique tank will surely be the center of attention any place you put it. Its hexagonal shape means it is possible to view your fish from a variety of angles.

It includes a reflector as well as a 12-inch light fixture. It is also constructed of acrylic, which is more durable and lighter than a comparable glass tank. It’s also less susceptible to cracking and chipping – ideal for homes that have children or pets.

SeaClear is a well-known brand in the aquarium industry and provides one of the most extensive warranties that match the high excellent quality of its products.

Dimensions of the Aquarium: 15(W) x 15(D) x 20(H) inches.


  • The tank is rounded at the corners, which is a fantastic security feature.
  • There are three different backgrounds that you can choose from at the time of purchasing.
  • You can even add your own heater and filter.
  • Acrylic is more durable and lighter than glass, which makes it safer for children.


  • It’s difficult feeding the fish (the principal opening of the fish is rather small).
  • The lid is not removable which makes it difficult to clean.
  • It is only a light fixture, but not the actual bulb.

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3. Premium Aquarium: Coralife LED Biocube Tank

Best Premium 15 Gallon Tank

Coralife LED BioCube Aquarium Fish Tank Kit, 16 Gallon
  • EVERYTHING YOU NEED - Feature a compact and customizable filtration...
  • GREAT FEATURES – Includes quiet submersible pump, dual intakes and...
  • SLEEK and MODERN – Biocubes feature a rounded edge design and is the...
  • VIBRANT LED LIGHTING - Low-profile hood contains vibrant LED lighting...
  • MAXIMIZE BEAUTY - 24-hour timer which makes it easy to control the...

Last update on 2024-05-08 / Affiliate links / Images from Amazon Product Advertising API

A little larger than 15 gallon fish tank, this 16-gallon tank is fashionable and is a great addition to any modern house.

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It’s actually a bit bigger than other tanks we’ve showcased in this article. The 16-gallon tank has LED lights, water filtration, and a pump.

The lighting integrated is dependent on the 24-hour timer and can be changed to any of three options: bright white, sparkling blue, or enhancement of color.

It also comes with a 30-minute sunrise and sunset function as well as a 60-minute moonrise and moonset function that accurately replicates the appearance of fish in their natural habitat.

It features an efficient and flexible filtering system that is built into the tank’s back. It also comes with a submersible pump that has dual intakes and a variable return nozzle.

Dimensions of the Aquarium: 15 x 16.8 x 17.5 inches.


  • It’s premium quality and has a well-constructed tank.
  • The tank is easy to set up, and the instructions are clear and thorough.
  • The tank’s rear is equipped with three chambers for equipment.
  • A very stylish and attractive tank.


  • It was quite expensive.
  • The LEDs aren’t suitable for plants that don’t require high-intensity lighting.
  • It is difficult to keep clean in certain areas.
  • The fan in the lid is very loud.

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4. Tetra 20 Gallon Complete Aquarium Kit

Tetra 20 Gallon Tank

Tetra ColorFusion Aquarium 20 Gallon Fish Tank Kit, Includes LED Lighting and Decor
  • Let the LED light transform your aquarium with each color change....
  • The anemones sway with your filter current and give your fish a place...
  • Tetra plants come to life under the glow of Color Fusion LED
  • The Tetra ColorFusion Kit includes: one 20 Glass gallon Aquarium, one...
  • Aquarium Dimensions:24.2" L x 12.4" W x 16.7" H

Last update on 2024-05-08 / Affiliate links / Images from Amazon Product Advertising API

Tetra is a name that has a strong reputation for producing high-quality products for the fishing industry.

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The tank is a bit over the 15-gallon limit, which is 20 gallons. However, it does come with everything you require to begin your new pastime.

The kit comes with a comprehensive collection of decorations to decorate your aquarium and allows you to select from three different designs according to your preferences.

Its LED lighting system has changing colors that truly bring your artificial plant life and aquarium decorations along with your fish.

It also comes with a very efficient as well as quiet Tetra Whisper filter system to keep your water in the top state, and there’s an electric heater which makes the tank suitable for tropical fish species.

The aquarium is constructed to withstand the rigors of scratch and is resistant to chipping and comes with a lifetime guarantee. The dimensions of the tank are 24.2 1” and 12.4′ and 16.7″ and all of it is made from the U.S.


  • Reputable brand and U.S.-made product
  • It is complete and will help you save money. All you need to include is water and fish
  • The LED lighting system incredibly colors and has a wide range of setting options
  • Lifetime warranty


  • Filter unit gets noisy after a couple of months and users have complained that the unit failed or was burned out
  • LED lighting units are difficult to operate.

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5.biOrb Classic 16-gallon Aquarium

biOrb Classic 60, 16-Gallon Tank

biOrb CLASSIC 60 Aquarium with LED - 16 gallon, Black
  • Constructed Out of Acrylic- 10 times stronger than glass, 50% lighter...
  • True 5 Stage Filtration - Biological, Mechanical, Chemical, Water...
  • Low Voltage – All biOrb aquariums operate from a 12V Transformer
  • LED Lighting – Equipped with a long lasting, low voltage Standard...
  • Filter Cartridge – A true “one size fits all” filter for the...

Last update on 2024-05-08 / Affiliate links / Images from Amazon Product Advertising API

This biOrb Classic 16-gallon Aquarium is designed to look similar to a traditional fishbowl.

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But, unlike the old-fashioned glass bowls, which were not suitable for your fishy friends, the biOrb comes with a robust, five-stage filtration system that’s hidden in a storage compartment underneath the tank.

The tank is constructed of extremely strong, yet beautifully clear acrylic. It also has an ordinary LED light inside the aquarium lid.

This sleek, classic style is great for homes that have small space, yet gives you and your family the chance to take pleasure in the tranquility of an aquarium in your home.


  • Beautifully constructed, traditional-looking fish bowl tank
  • Very little maintenance needed
  • The five-stage filtration system provides clean, clear water.


  • The area is difficult to wash.
  • A low oxygen level won’t work for any fish species

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6.biOrb Cube 60 Aquarium with LED

Best 16 Gallon Transparent Aquarium

biOrb Cube 60 Aquarium with MCR - 16 Gallon, Transparent
  • Stylish approach on traditional shape. Constructed out of Acrylic - 10...
  • True 5 stage filtration - biological, mechanical, chemical, water...
  • Unobstructed view of your Aquarium inhabitants - equipped with a long...
  • Filter cartridge - DESIGNED TO fit all biOrb aquariums.
  • Effortless set up. Easy feeding access - feed hole conveniently...

Last update on 2024-05-07 / Affiliate links / Images from Amazon Product Advertising API

This biOrb Cube 60 Aquarium is a 16-gallon fish tank with dimensions of 15.7′ inches and 15.7 17 15.7′.

It offers an entirely unobstructed perspective of your fish and offers plenty of room to use for aquascaping. You can select between white, black, and clear trim.

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The fish will be illuminated with remote-controlled lighting that comes with no less than 16 colors to choose from.

It is possible to set the lighting unit to gradually fade in and out across the entire spectrum and you can adjust the brightness as well.

The highest quality of water is ensured through the five-stage filtering system that is simple and easy to maintain. The light and pump are low-voltage to ensure safety and security.

The aquarium is constructed of tough, durable acrylic. It is covered by two years of no-quibble, non-stress warranty.


  • Acrylic construction is stronger and more light than glass.
  • Excellent five-stage filtering system, which includes mechanical, biological chemical, oxygenation, and water stabilizing components
  • Exciting controlled remotely LED lighting system
  • Easy, no-hassle maintenance
  • Two-year warranty


  • There isn’t a heater included.

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7.Fluval Vista Aquarium Kit 16 Gallon

Best 16 Gallon Freshwater Aquarium

Fluval Vista Freshwater Aquarium Kit, 16 Gallon
  • 16 US Gal (60.5 L) glass aquarium with panoramic, bent-glass design
  • Energy-efficient 8000K LED with Soft-Start feature – gradually...
  • AquaClear 30 clip-on filter with multi-stage cleaning process –...
  • Kit includes LCD thermometer, fish net, Fluval Tropical Fish Flakes,...

Last update on 2024-05-08 / Affiliate links / Images from Amazon Product Advertising API

With the benefit of a panoramic design, easy-to-open doors, energy-efficient soft start lamps, and AquaClear filters, the Fluval Vista Aquarium Kit 16 Gallon is the perfect option for those who are looking for beautiful design, security, and simple maintenance.

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Its energy-efficient Soft Start LED mimics the sun’s natural light by turning off slowly to keep from waking fish. Only recommended for soft drinks.

This kit is a 16-gallon glass aquarium that features a panoramic bent-glass design. It comes with an energy-efficient 8000K LED that slowly dims to create an unnatural effect, and will not disturb fish.

This AquaClear 30 clip-on filter has multiple cleaning stages to ensure crystal-clear water and lower the frequency of water change.

In addition, the kit comes with the following: an LCD thermometer, fishnet, Fluval Tropical Fish Flakes, Fluval Aqua Plus Water Conditioner, Fluval Cycle Biological Enhancer, and Fluval Clean Water Guide.


  • Quiet and High-quality AquaClear hang-on-back filter that comes with three kinds of filters (many filters do not have bio-media but not this one)
  • Fluval heater included (ADJUSTABLE temperature)
  • Hinged lid that is easy to clean and maintenance
  • Hinged front door to feed the livestock.
  • The panel that is removable for the back of the lid to serve as a heater cord and filter (could also be used to connect tubing for CO2 injection and so on.)
  • LED lighting is powered by a timer and comes with a variety of options for touch-screen settings (day, day w/ blue, night).
  • Curved front edges
  • Aquarium comes with quality glass that is thick and packed nicely in the box, and delivered with an external container that is filled with Styrofoam.
  • There are no rear sump compartments that are difficult to wash. Clean your biological media and the filter, then replace the carbon bags after a couple of months, and you’re done!


  • Curved sides distort the view a bit but look nicer than a silicone seam
  • LED light is close to the water and subject to condensation.
  • The filter is powerful, but you will probably need to place some mesh over the filter intake at the bottom.

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Essential components of a 15 Gallon Fish Tank

If you choose to install a freshwater or cold water tank, they all require the same basic apparatus: lights and a filter are a must.

15 Gallon Fish Tank Equipment Sponge Filter Foam


A filter must be installed in each fish tank to keep the water clear.

The majority of filters use a 3 step procedure:

  • Biological filtration (to convert ammonia and Nitrites into nitrates).
  • Mechanical filtration (to remove the larger waste particles).
  • Chemical filtration (to remove organic contaminants that aren’t able to be eliminated by mechanical or biological filtering).

There are a variety of filters available, however, the most commonly used kind to be used in the 15 gallon fish tank is a hang-on back filter.


The majority of freshwater fish, as well as plants, require regular light. In order to replicate natural light artificial lighting is utilized in aquariums for fish. tanks.

Artificial lighting can provide living creatures in your aquarium with a proper amount of light. This is essential for the growth of healthy fish.

There are numerous types of lighting options for your tank, ranging starting from LED strip lighting to incandescent bulbs. The kind you pick will depend on the plant and the fish you keep.

An excellent all-purpose light is LED lighting. The most recent lighting fixtures are full-spectrum and provide your family members with the best natural light you can get.


Installing a heater into your tank for fish You have the possibility of adding a greater variety of fish into the tank.

This is due to the fact that there is plenty of tropical fish available than there are cold-water species.

There are many kinds of heaters available that range from completely submersible heaters to in-line heaters to substrate heaters.

The most sought-after kind of heater is a fully submersible model – it comes with a temperature set in advance or a dial, so you can alter the temperature at any time.

Other Equipment

There will be additional equipment to build your tank before you start. At a minimum, you’ll require:

  • Water Conditioner
  • Thermometer
  • Water Test Kit
  • Gravel Syphon
  • Bucket
  • Fish Net
  • Fish Food
  • Filter Media
  • Algae Magnet

The rest is left to you. Other well-known additions include:

  • Gravel/Sand
  • Rocks
  • Driftwood
  • Caves
  • Plants

Tank Setup Ideas

The possibilities are limitless when you’re deciding on how to set up your tank. Below are a few of the most popular options below in order to help choose the best method for setting the tank.

How Many Fish Can You Keep In A 15 Gallon Fish Tank?

What and How Many Fish Can You Keep in a 15 Gallon Fish Tank

The most common rule of thumb in fishkeeping is that one inch of fish needs 1 gallon of water.

This sounds simple however there are some aspects to take into consideration when the process of setting up a tank for a community:

  • The fish’s size as an adult is small. Will a juvenile fish grow out of the tank?
  • Temperament – calm fish is the best choice for community tanks.
  • Water parameters – all fish have to meet the same needs for water pH.
  • Temperature – All fish should have the same requirements for temperature in the water.
  • Social behavior of some fish – certain species have to be in schools and others live alone.

Let’s look at some of the most peaceful species of fish that are suitable for the 15 gallon fish tank. Be sure to research the temperament of each species and requirements before you purchase!

What Fish Can You Keep In A 15 Gallon Fish Tank?

A 15 gallon fish tank for fish is perfect for a group of schooling fish. If you decide to select a fish, be sure that they require the same conditions for water, and also that they’re compatible with one another.

Here are a few examples of fish that are colorful and you can keep

  • Guppies (active live-bearing fish that are active, males are colorful)
  • Tetras (schooling fish that come in a myriad of colors)
  • Danios (hardy and active schooling fish)
  • Barbs (lively and easy to take care of to care for schooling fish)
  • Dwarf Corydoras (gentle bottom-dwelling fish)
  • The Platy Fish (peaceful but lively fish that can be most happy when in groups)

Alongside keeping fish in your aquarium, you may be interested in keeping certain invertebrates inside your aquarium. There are many options to choose from:

If you select calm tiny (1-2 inches) fish, they will be perfect for the 15-gallon setup.

Avoid fish that get any larger than 2 inches, and avoid fish with an aggressive, or territorial behavior (unless you’re keeping them in a tank on their own).

Beginners Freshwater Community Tank

15 Gallon Fish Tank Reviews and Setup Ideas

If you’re looking to keep things simple, we recommend picking among the shoaling species above and keeping an assortment of 4-5 with a few shrimps as well as snails or conch. If you’re thinking of being slightly touched braver you can try these setups below:

Example 1:

Example 2:

This setup can also maintain some of the most popular freshwater plants, such as Hornwort, Anacharis, Temple Compacta, or Java Fern.

Biotope Tank

The 15-gallon size is a perfect size for setting up small biotope tanks that are based on a specific region or water body.

Many experienced aquarists are interested in exploring the specific area to discover what species of fish are native and which kinds of species they are living with.

They then try to recreate the natural ecosystem as closely as possible.

You could, for instance, make your tank based on the South American river and add a small school that is Harlequin Rasboras.

Breeding Tank

Based on the species you want to breed, you’ll have to set the tank to ensure that they are safe, and you are able to access the eggs and parents at any time if you want to.

The majority of breeding tanks for fish that lay eggs are often quite empty and consist of a simple filter and a heater.

They rarely have any kind of vegetation or even gravel since eggs may be snagged and are hard to get rid of. Some fish do require plants to breed and construct their nests, like Bettas.

How To Setup Your 15 Gallon Fish Tank

How To Setup a 15 Gallon Fish Tank

The process of setting up your tank for fish is simple once you understand how to set it up.

In the beginning, you must choose where it will remain (once the water is added, to it, it is very difficult to move). Be sure that the location you’ve selected is level, far from any direct sunlight and from sources of heat.

After that, clean the tank with a new towel with warm water in order to get rid of dust (it’s essential to avoid using any equipment from the past in the event that old chemicals are absorbed in the tank).

Then, you can place 2 inches of the substrate at the bottom on the bottom of your tank.

Include the necessary equipment in the aquarium including the heater, filter, and lights as well as the thermometer But don’t switch them on just right away.

You should fill the tank 2/3 to the full with water and put your decorations and plants in the appropriate place.

You can fill the tank to the fill line, and add a de-chlorinator to make tap water secure for the fish you are keeping.

When the tank is fully filled when it is full, turn the machine off and allow the tank to run over 4-6 weeks.

Utilize a test kit to examine the pH ammonia Nitrites, and Nitrates during the time of cycling.

The tank is ready when you’ve observed the ammonia levels and nitrate levels rise and drop to 0ppm while nitrates should be lower than 10ppm.

Many people do not bother with the cycling portion, however, this is vital if you wish to ensure your fish has longevity and health.

Which Is The Best 15 Gallon Fish Tank? (Summary)

A 15 gallon fish tank is a perfect size for someone who is seeking a moderate setup to begin your hobby.

The tanks that we’ve reviewed throughout this post are high-quality options that can give you the equipment you require to begin your journey.

Selecting to go with a 15 gallon fish tank offers you the same options you can get with a 10-gallon tank, however, it gives you a bit of additional space.

If you’re looking for a complete set-up and a complete setup, then the Fluval flex kit is the ideal choice for you.

If you’re looking for something that will attract attention and is different from the rest, pick a hexagonal-shaped aquarium.

When selecting fish for your aquarium, make sure to select tranquil species that be a good fit. If you’re not sure, ask the person at the fish shop in your area for guidance and advice.

No matter which one you pick You will enjoy creating it and taking care of your fish for the years to follow!

Are you thinking of a particular configuration or idea for stocking in your thoughts? We’d like to hear your ideas in the comments beneath…


Dibyajyoti Bordoloi is the creator and author of FishCampRehab.com, a third-generation experienced fish keeper and owner of a successful pet breeding farm. He is also a member of the Center for Wildlife Rehabilitation And Conservation (Assam), the Marine Aquarium Societies of North East India, and the Kaziranga Nature Conservancy of Assam.