Best fish for small tank

If you have decided that you are going to start with the small freshwater fish tank, you also need to decide whether it is going to be a heated fish tank or the cold water tank. Deciding on the type of tank will resolve what kind of fish you can have because each fish has their requirements when it comes to water temperature. Just because they are all fish, it doesn’t mean that they can live in the same water. Some fish are okay with cold water while some can only live in lukewarm water. Make sure to decide this factor before you can choose the right fish for small tanks.

Some small tank Fish

Dwarf Puffer

  • Care Level:  Advanced
  • Temperament:  Aggressive
  • Diet: Omnivore
  • Water Conditions:  77°F – 82°F
  • Max.Size : 1-24 inches
  • Family: Tetraodontidae
  • Lifespan: 10 years or more

Puffer fish are cute looking chubby fish that are found all over the world. They can be a challenge to keep but they are very rewarding for experienced aquarists. This tropical fish comes with most colors and sizes. The many species have peculiar and unique hunting techniques that are mesmerizing to watch. They are well known for their dangerous venom, known as tetrodotoxin. But don’t worry, they cannot produce it themselves and therefore are mostly harmless in captivity.

Betta Fish

  • Care Level:  Easy
  • Temperament:  Semi-aggressive
  • Diet: Omnivore
  • Water Conditions:  78° to 80°F
  • Max.Size : 6 inch
  • Family: Cichlidae
  • Lifespan: 10 years
betta fish tank

Due to beautiful wings, this fish is kept in special aquariums. It is very small, which is made especially for small tanks. Usually, this fish likes to be alone. The tail size of these fish is different. Someone’s tail looks like half a moon, like someone’s crown tale. It looks very beautiful to see these fish of red, blue, purple and white colors moving in the container. You can also keep it in a small jar or container.

Celestial Pearl Danios

  • Care Level:  Medium
  • Temperament: Peaceful
  • Diet: Omnivore
  • Water Conditions:  73-79°F
  • Max.Size :Up to 1 inch
  • Family: Cyprinidae
  • Lifespan: 3-5 Years

Celestial Pearl Danio is a freshwater fish found in small ponds in South East Asia. These fish boasts plenty of color from the white pearl-like spots on their sides to the red coloration on the fins. Discovered within the past decade, aquarium hobbyist have quickly adopted and fallen in love with these little Danios. They are well suited for tanks that are packed with vegetation and other colorful fish that mimic their peaceful nature. It is true that these fish are timid; they work perfectly in communities full of Guppies, Mollies, and Tetras.

Bumblebee Goby

  • Care Level: Moderate
  • Temperament: Peaceful
  • Diet: Carnivore
  • Water Conditions:  73-79°F
  • Max.Size :up to 4.2 centimeters (1.7 in)
  • Family: Gobiidae
  • Lifespan: up to 4 years

Bumblebee Goby is also known as Brachygobius xanthozona, these are small aquarium species of bottom-dwelling fish. The size of these fish can be 1 cm when you buy them and the size of an adult Bumblebee gobies can reach up to maximum 4 cm. Like their name, they are colored like a bee with black and yellow stripes. In order to differentiate female Bumblebee gobies from male, you need to compare their color as male ones are brighter.

Sparkling Gourami

  • Care Level: Easy
  • Temperament: Relatively peaceful
  • Diet: Omnivore
  • Water Conditions:  77 °F to 83 °F
  • Max.Size :Up to 1.6 inches
  • Family: Osphronemidae
  • Lifespan: 4-5 years

The Sparkling Gourami (Trichopsis pumila), is also known as Pygmy Gourami, is a small freshwater fish native to the ponds, slow rivers and rice fields of Southeast Asia. It is a member of the Osphronemidae family and the Anabantiformes order. These Gouramis are very small and usually live up to 5 years. However, in good aquarium conditions, they may sometimes live longer. Their beautiful colors, scales, and compatibility make it a great choice for people looking to add a pinch of originality into their tank.

Endler’s Livebearers

  • Care Level: Easy
  • Temperament: Relatively peaceful
  • Diet: Omnivore
  • Water Conditions:  77 °F to 83 °F
  • Max.Size :Up to 1.6 inches
  • Family: Osphronemidae
  • Lifespan: 4-5 years

Endler’s livebearers (Poecilia wingei) are a colorful and relatively rare species of guppies. They are found only in Laguna de Patos in Venezuela, which is a large freshwater lake. They are not technically a separate species from the common guppy, and it is believed that they were given the name Poecilia wingei for conservation purposes only.

Least Killifish

  • Care Level: Easy
  • Temperament:  peaceful
  • Diet: Carnivore
  • Water Conditions:  66-75
  • Max.Size :2-3 cm (0.8-1.2″)
  • Family: Poeciliidae
  • Lifespan3+ years

Least Killifisg is also known as the Dwarf Livebearer, Least Killifish is one of the smallest species of freshwater fish in the world and they are the smallest species found in North America. These fish are native to the south-eastern United States where they can be found in shallow, densely-vegetated and slow-moving waters. They may even be found in brackish conditions. These fish can be identified by their olive coloration and the dark stripe running laterally along the body.

Norman’s Lampeye Killifish

  • Care Level: Hardy
  • Temperament:  peaceful
  • Diet: Carnivore
  • Water Conditions:  73 °F to 78 °F
  • Max.Size :1.2 – 1.6 inches (3 – 4 cm)
  • Family: Poeciliidae
  • Lifespan: 2-4 years

The scientific name for Killifish is Aplocheilichthys normani. These are fabulous fish with beautiful colors. The ancestors of these Killifish came from Africa, but now they live in aquariums all over the world. In aquariums, Killifish can grow to be about 2" long. Killifish are sometimes aggressive fish. Some recommended tank mates include smaller community fish and catfish such as a pleco.

Golden Dwarf Barbs

  • Care Level: Easy
  • Temperament: Peaceful
  • Diet: Omnivore
  • Water Conditions:70-77°F
  • Max.Size:5-6cm/2-2.5 inches
  • Family: Cyprinidae
  • Lifespan:  2-3 years

Golden Dwarf Barb also is known as (Pethia gelius), it is a very small barb species that is an excellent fish for the nano or planted aquarium. It is known for its small size, faded black striping, and very peaceful demeanor. This fish is not as heavy-bodied or boisterous as many other barb species. It is compatible with most other peaceful species that inhabit similar water conditions.

Neon Tetras

  • Care Level:   Easy
  • Temperament:  Peaceful
  • Diet: Omnivorous
  • Water Conditions:  70-81° F
  • Max.Size :  1.5 inches
  • Family: Characidae
  • Lifespan: Up to 8 years 

The Neon Tetra is also known as neon fish. It is a freshwater fish that belongs to the Characidae family and is known for its dazzling colors and energetic temperament. So much so that around 2 million are sold in the US each month; the vast majority of these are bred in captivity. They are a great, non-aggressive, community fish and spend the majority of their time in the middle of the water column. These fish should generally be kept in schools with at least 15 members. Smaller schools than this can feel threatened and this can cause stress.

Pygmy Corydoras

  • Care Level:   Easy
  • Temperament:  Peaceful
  • Diet: Omnivorous
  • Water Conditions:  72-79 °F
  • Max.Size :  1″/2.5 cm
  • Family: Callichthyidae
  • Lifespan: 3 years 

Pygmy corydoras (Corydoras pygmaeus) is an amazing, small fish that got its name due to its tiny size. This corydoras species are not as brightly colored as other fishes, but its size is its sufficient advantage. It allows keeping Pygmy corydoras even in nano tanks. Their back is a bit darker than the fish abdomen; there is a black horizontal stripe along the fish body sides. It ends near the tail fin and becomes wider and with an oval-shaped ending. There is another thin black stripe below this one that goes from anal fin to abdominal fin.

Guppies

  • Care Level:   Easy
  • Temperament:  Peaceful
  • Diet: Omnivorous
  • Water Conditions:  70-80° F
  • Max.Size : 0.6 – 2.4 inches
  • Family: Poeciliidae
  • Lifespan: Up to 2 years 
Guppies

The guppy, also known as rainbow fish and million fish, is one of the world's most widely distributed tropical fish, and one of the most popular freshwater aquarium fish species. Aquarium guppies are most popular because you can keep them in a smaller tank and their bio-load is small. These fish is filled with bright colors making them beautiful and fun to watch.

Dwarf Gourami

  • Care Level:   Easy
  • Temperament:  Peaceful
  • Diet: Omnivorous
  • Water Conditions:  72-82° F
  • Max.Size :  4- 4.5 inches
  • Family: Osphronemidae
  • Lifespan: Up to 5 years 

Dwarf Gourami is a very popular and colorful species in freshwater fish-keeping. Their striking coloration and docile nature make them an alluring centerpiece fish in community tanks for aquarists of all skill levels. Dwarf Gourami is generally very peaceful and a great addition to community aquariums.

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