10 Best 5 Gallon Fish Tank

Updated on: September 2021

Best 5 Gallon Fish Tank in 2021


Marineland Portrait Glass LED aquarium Kit, 5 Gallons, Hidden Filtration

Marineland Portrait Glass LED aquarium Kit, 5 Gallons, Hidden Filtration
BESTSELLER NO. 1 in 2021

Koller Products AquaView 6 Gallon 360 Fish Tank with Power Filter & LED Lighting

Koller Products AquaView 6 Gallon 360 Fish Tank with Power Filter & LED Lighting
BESTSELLER NO. 2 in 2021
  • Are you looking to buy an aquarium for your children? If you are, you are going to want to look at this fish Tank. Owning an aquarium can be a really fun and rewarding experience and an ideal way to teach your child the responsibility of pet ownership
  • Energy-efficient LED lighting with 7 dazzling color selections to brightly illuminate your fish, choose daylight White, Blue, green, amber, aqua, Purple, or Red
  • Powerful internal power filter cleans and purifies Aquarium water at a flow rate of 45 gallons per hour effectively removing organic pollutants including discoloration, odors, heavy metals, and toxic gases. Uses Tetra Whisper small replacement filter cartridges
  • Made of impact-resistant plastic with crystal-clear clarity so good that most think it's made of glass; all the while providing leak-proof assurance, unlike glass tanks glued together with silicone, this one-piece Tank puts to rest any worries or concerns about possible leaks. Dimensions: 11 Dia x 19.8 H inches
  • 100% satisfaction guaranteed. If you need a part or help, please contact us at [email protected] for fast, friendly service

Marineland Contour 3 aquarium Kit 3 Gallons, Rounded Glass Corners, Includes LED Lighting

Marineland Contour 3 aquarium Kit 3 Gallons, Rounded Glass Corners, Includes LED Lighting
BESTSELLER NO. 3 in 2021
  • SLEEK DESIGN: Rounded corners and clear glass canopy allow viewing from multiple angles.
  • DAYLIGHT/MOONLIGHT SETTINGS: Bright white LEDs create a shimmering sunlight effect; blue LEDs produce a moonlit glow.
  • EASY ACCESS: Hinged LED rail light and sliding glass canopy.
  • DIMENSIONS: The Marineland Contour 3 aquarium measures 9. 5 inches x 10 inches.

Aqueon 100527256 Fish Tank Aquarium LED Kit, 10 Gallon

Aqueon 100527256 Fish Tank Aquarium LED Kit, 10 Gallon
BESTSELLER NO. 4 in 2021
  • Low profile full hood contains vibrant cool white LED lighting to bring your aquatic environment to life
  • QuietFlow 10 LED PRO power filter has a red LED light that flashes to indicate when it’s time to change the cartridge – no more guessing!
  • Preset heater will keep your aquarium temperature at a constant 78 degrees, appropriate for most tropical fish
  • Complete setup guide included
  • Complete aquarium kit includes: 10 gallon glass aquarium, low profile LED full hood, QuietFlow 10 LED PRO power filter with medium cartridge, 50W preset heater, premium fish food, water conditioner, fish net, stick-on thermometer

Aqueon Aquarium Fish Tank

Aqueon Aquarium Fish Tank
BESTSELLER NO. 5 in 2021
  • Ships in own container with reinforced packaging to protect product
  • Black trim design with clear silicone seals
  • Suitable for freshwater or marine inhabitants
  • Aquarium measures 20-1/4" X 10-1/2" X 12-9/16"
  • Made in the USA

Hygger 4 Gallon Glass Fish Tank Smart LED Temperature Display Aquarium Starter Kit with Lid

Hygger 4 Gallon Glass Fish Tank Smart LED Temperature Display Aquarium Starter Kit with Lid
BESTSELLER NO. 6 in 2021
  • Hygger 4 Gallon Aquarium Starter Kit Includes – 4 gallon glass aquarium, 3-in-1 water pump, 4 LED lighting mode hood, and 2-pack filter cartridges replacement. Add gravel, fish, plant and décor to complete your aquarium
  • Smart Touch Screen LED Lighting Hood – Simple touch to the button next to digital number of the aquarium lid to switch from shimmering white daytime effect to relaxing moon light for night. 4 lighting modes with white, blue, red and green LED bulbs
  • Quiet 3-IN-1 Water Pump – This 3-watt submersible pump helps water cycling while the bio ball filter cartridge box helps to clean water, absorbs odors and discoloration, provide a crystal clear water for your aquarium. Connect with air tube, it produces bubbles that agitate water surface (PS: water flow is non-adjustable)
  • Easy Access Flip Lid – Flipped aluminum canopy is easy to access to tank for feeding and regular maintenance ; Equipped with temperature probe, easy to read digital LED real time water temperature
  • Easy to Set up and Maintain – This sleek, modern fish tank completes any compliment of home, office, counter and desktop. Perfect for house small tropical fish, shrimp and plant. Aquarium dimension: 11" L x 7.5" W x 12.6" H

Tetra ColorFusion Starter aquarium Kit 3 Gallons, Half-Moon Shape, With Bubbler And Color-Changing Light Disc

Tetra ColorFusion Starter aquarium Kit 3 Gallons, Half-Moon Shape, With Bubbler And Color-Changing Light Disc
BESTSELLER NO. 7 in 2021
  • aquarium KIT Half-moon shape allows 180-degree panoramic viewing – starter kit has everything you need
  • BUBBLE CURTAIN Bubbling disc automatically cycles through a rainbow of LED light colors
  • INCLUDES FILTER Includes air pump-driven Tetra Whisper Internal Power Filter to keep your tank clean and provide a healthy environment for pet fish
  • AIR PUMP Drives both the bubbling disc and the filter
  • CONVENIENT Clear canopy has a hole for easy feeding

Tetra LED Cube Shaped 3 Gallon Aquarium with Pedestal Base

Tetra LED Cube Shaped 3 Gallon Aquarium with Pedestal Base
BESTSELLER NO. 8 in 2021
  • Equipped with a Tetra 3i filter to keep your tank clean and provide a perfect environment for small tropical fish.
  • The tank features an LED light to show off your fish
  • Lid features a convenient feeding hole. Material : Glass and acrylic
  • Perfect for small tropical fish, goldfish or betta.
  • 10" D x 10"W x 10.512"H
  • Equipped with a Tetra 3i filter to keep your tank clean and provide a perfect environment for small tropical fish
  • The tank features an LED light to highlight your fish
  • The lid features a convenient feeding hole
  • For small tropical fish, goldfish, or a betta
  • 10" D x 10"W x 10.512"H

GloFish Crescent Aquarium Kit 5 Gallons, Includes Hidden Blue LED Light And Internal Filter

GloFish Crescent Aquarium Kit 5 Gallons, Includes Hidden Blue LED Light And Internal Filter
BESTSELLER NO. 9 in 2021
  • INCLUDES ALL THE ESSENTIALS: This 5 gallon kit includes a seamless, crescent-shaped tank, Tetra Whisper Bio-Bag Filter Cartridge, black canopy with convenient feeding hole and energy-efficient blue LED lighting.
  • BLUE LED LIGHTS: Hidden blue LED lights are incorporated into the hood, giving your GloFish fluorescent fish an exciting and uniquely fluorescent look.
  • INTERNAL FILTRATION: The filter pulls water from the aquarium and pushes it through the filter cartridge, where the dense, dual-sided mesh catches debris and waste.
  • INCLUDES HOOD: Sleek black hood reduces evaporation and helps keep fish from jumping.
  • EXPERIENCE THE GLO: GloFish fluorescent fish and products create a complete underwater fluorescent experience.
  • Crescent shaped seamless plastic aquarium
  • Clear plastic canopy Blue LED overhead light with Primary Material being Acrylic.
  • Medium size filter cartridge.

Koller Products 6.5-Gallon Aquarium Kit with Power Filter and LED Lighting, (AP650)

Koller Products 6.5-Gallon Aquarium Kit with Power Filter and LED Lighting, (AP650)
BESTSELLER NO. 10 in 2021
  • Energy-efficient LED lighting with 7 dazzling color choices to brightly illuminate your fish; choose daylight white, blue, green, amber, aqua, purple, or red
  • Powerful internal power filter cleans and purifies aquarium water at a flow rate of 45 gallons per hour as the Tetra Whisper S filter cartridge effectively removes organic pollutants (including colors, odors, heavy metals, and toxic gases)
  • Made of impact-resistant plastic with crystal-clear clarity so good that most think it's made of glass
  • One-piece construction providing superior strength and durability, unlike glass tanks glued together with silicone, this stylish shaped tank puts to rest any worries or concerns about possible leaks
  • Easy to set up and maintain, this trendy fish tank will look good wherever you place it. Dimensions: 18" L x 11" W x 13.5" H
  • 100% Satisfaction Guarantee. Dedicated to serving our customers, need help or a replacement part, please contact us at [email protected] for fast, friendly service.

Bringing Home Your First Betta Fish

Betta splendens is a beautiful fish with long, flowing fins. With it's timeless popularity, numerous breeding programs have produced truly amazing color and fin varieties.

It is also a relatively hardy and easy-to-keep fish. It is in a group of fish called the anabantoids (this group also includes gouramis and paradise fish). These fish all have an accessory organ called a "labyrinth" in addition to their gills, which allow them to breath air directly from the surface in addition to that which is dissolved in the water. It does mean that they can tolerate a bit more pollution than other fish temporarily, but they should be given fresh, clean water.

Many people see bettas in tiny bowls barely a cup in volume, and come to believe that they actually like it this way. Some people will also have heard that bettas in Nature come from tiny muddy pools of water, making it sound like these little bowls may actually be an improvement on their natural habitat.

This is not really the whole truth; actually, these fish are from SE Asia (Cambodia, Vietnam, etc.) rice paddies, and their labyrinth is mainly an adaptation for dealing with cramped living quarters before the monsoon season when a lot of their natural range will have dried up. However, this is not meant to be a long-term adaptation to years and years in a tiny volume of water in a closed system.

Bettas appreciate clean water and room to swim just like any other fish, though they do not need a huge tank like others, because they are not "power swimmers". For a single betta, I would recommend something on the order of a 2-10 gallon tank. Here is an example of a nice setup I made for my own betta:

Because of their relatively slow metabolism and slow swimming, they are vulnerable to diseases when the water gets too stagnant. For this reason, I recommend a gentle-current filter, such as a very small sponge filter made for a tiny tank or a hang-on-the-back (smallest model) filter for a 5-10 gallon tank. They can be kept without filters, however this requires that you be especially diligent about doing 25%-by-volume water changes at least every week, if not every 2-3 days. If a filter is used, water changes can be done every 1-2 weeks in a 5-10 gallon tank. Their long fins can otherwise be easy targets for diseases like bacteria and fungus if water quality is not kept high, so test your water often.

They can also survive in the short term without a heater in the summer, but in the long term, I do advise that they have a heater in the fall and winter when room temperatures can change, because they are tropical fish. When temperatures fall below 72 degrees, their metabolism drops off substantially, and this is a stress on their immune system. To reduce the risk of disease, I recommend even a small heater for something of a 2 gallon tank size. There are very small ones made by companies such as Visitherm, and if you cannot find them in your LFS, you can try online places like eBay and Aquabid, or some of the many Online Retailers of Fish Supplies listed in the links section.

For the above reasons, I am personally not a fan of "betta vases" and tiny container kits such as Aquababies, because they do not allow for filtration/heat, and are not made with the fish's health in mind. I consider them mostly gimmicky items that strive to show the betta's beauty but without considering them as animals with needs of their own.

Bettas do not make the best community tank fish. They can be outcompeted for food by faster swimming fish, and sometimes their long, trailing fins become easy targets for nippy fish (some barbs, danios and tetras especially). They can also be aggressive. Never keep two males together, because they will fight until one dies; females (less often available and not as attractive, but you can find them in some LFS) and a male may be kept together with caution in a 5-10 gallon tank which is well-planted, but they may still fight and cause each other great injury. Bettas will occasionally also display aggression to very brightly colored and red fish such as platies, if they believe them to be another male betta threat. For this reason, males are best kept by themselves, or only with very different-looking and peaceful fish, such as small bottom feeders (corydoras catfish, kuhli loaches) and ghost shrimp.

The interesting behavior of these unique fish can be brought out with some simple tricks. One is to place a mirror on the outside of the tank. The male betta will see it and think it is another male, causing him to display his finnage in all its glory, and "gill flare" at his reflection in an attempt to intimidate the competition. Male bettas will also build bubble nests when they are happy. They do this by blowing bubbles that stick together with their own saliva. They can be encouraged to do so when there is no heavy bubbling and aggitation in the tank, and cover by some floating plants such as duckweed. They should, however, still be given some gentle circulation and uncovered area on the surface to come up for air.

Bettas should be fed a good variety of foods, doing best with types like small shrimp pellets and "betta bites" as a staple. They will readily accept treats such as live/frozen brine shrimp and bloodworms, but as with any fish, must be fed with great moderation. Overfeeding in a smaller tank is many times worse than overfeeding in a large tank, as smaller tanks accumulate pollution much faster.

Bettas are truly gorgeous pets that can have interesting "personalities". Take care of yours, and you will be rewarded for many years with a low-maintenance and worry-free pet!

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