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Tetras

Colorful and Peaceful Schooling Fish

Tetras are among the most popular freshwater aquarium fish, known for their lively schooling behavior, bright colors, and gentle temperament. They’re perfect for community tanks and bring constant motion and sparkle to any aquarium setup.

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Tetras are schooling fish, so we always recommend purchasing at least four — and ideally six or more if your aquarium size allows. A good rule of thumb for any aquarium is one inch of fish per one gallon of water. Keeping them in a group helps them feel secure and show their best colors and natural movement.

The Tetra family is broad and diverse, ranging from classic community species like the Neon Tetra and Lemon Tetra to the larger and more robust Alestes and Congo Tetras, which can even hold their own in tanks with semi-aggressive cichlids. Most Tetras in the aquarium trade — aside from Congo and Alestes varieties — originate from the soft, slightly acidic waters of South America’s Amazon Basin.

At AquariumFish.com, we carry a wide selection of healthy, tank-raised Tetras for sale, available in every size and color. These fish are hardy, peaceful, and ideal for aquarists who want a vibrant, active community aquarium.

Why Choose Tetras?

  • Peaceful and colorful schooling fish perfect for community tanks
  • Hardy and beginner-friendly species that adapt well to aquariums
  • Wide range of varieties from tiny Neons to larger Congo Tetras
  • Active swimmers that bring movement and sparkle to planted aquariums

Care Tips for Tetras

  • Keep groups of six or more for natural behavior and reduced stress
  • Maintain stable water parameters: pH 6.0–7.5, temperature 74–80°F
  • Provide plants, driftwood, and soft lighting to mimic their natural habitat
  • Feed a varied diet of flakes, micro-pellets, and frozen or live foods

Popular Tetra Species We Offer

  • Neon Tetra – small, shimmering blue-and-red classic community fish
  • Cardinal Tetra – brighter red stripe and slightly larger than Neons
  • Lemon Tetra – peaceful, translucent yellow with red eyes
  • Congo Tetra – larger, flowing fins and metallic rainbow coloration
  • Ember Tetra – fiery orange schooling fish perfect for nano aquariums

Explore related collections: Freshwater Fish · Rasboras · Aquatic Plants

Tetra FAQs

How many Tetras should be kept together?
Tetras are happiest and healthiest when kept in groups of six or more. Schooling behavior helps them feel safe and show their natural color and activity.
Are Tetras good beginner fish?
Yes — most Tetras are hardy, peaceful, and easy to care for, making them great for new aquarists and community aquariums.
Can Tetras live with other fish?
Tetras get along well with other small, peaceful fish such as Rasboras, Guppies, Corydoras, and small Gouramis. Avoid aggressive or fin-nipping species.

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