Paraguay Tetra

About the Paraguay Tetra

The Paraguay Tetra is a lively and attractive freshwater schooling fish native to the Paraguay and Paraná River systems of South America. Known for its shimmering silver body, subtle golden sheen, and flashes of red and orange in the fins, this active tetra brings constant movement and colour to community aquariums.

This species thrives in planted aquariums with open swimming areas and appreciates gentle water flow that mimics its natural habitat. Paraguay Tetras are peaceful by nature but are energetic swimmers, making them ideal companions for other active community fish such as rasboras, Corydoras, rainbowfish, danios, and larger tetra species.

Like all schooling fish, they should be kept in groups of at least six, although schools of ten or more provide the most natural behaviour and create an impressive display. A varied diet of premium flakes, micro pellets, frozen foods, and occasional live foods will help maintain their health and vibrant colours.

Quick Care Guide

Scientific Name

Aphyocharax paraguayensis

Common Name

Paraguay Tetra

Origin

Paraguay, Brazil and Argentina

Adult Size

4–5 cm

Temperament

Peaceful and active

Diet

Omnivore

Minimum Tank Size

75 Litres

Temperature

22–28°C

pH

6.0–7.5

Water Hardness

2–15 dGH

Difficulty

Beginner

Lifespan

4–6 Years

Suitable For

Peaceful community and planted aquariums

Frequently Asked Questions

Are Paraguay Tetras suitable for beginners?

Yes. They are hardy, active, and easy to care for, making them a great choice for beginner aquarists with a mature aquarium.

How many Paraguay Tetras should I keep?

A minimum of six is recommended, although groups of eight or more encourage natural schooling behaviour and reduce stress.

What do Paraguay Tetras eat?

They readily accept quality flakes, micro pellets, frozen foods such as bloodworms and brine shrimp, and small live foods.

Can Paraguay Tetras live with shrimp?

Adult shrimp such as Amano Shrimp are generally compatible, although very small shrimp and shrimplets may occasionally be eaten.

Do Paraguay Tetras need a planted aquarium?

While they can be kept in community tanks, planted aquariums with open swimming space help them feel secure and display their best colours.

Common Mistakes

Keeping too few fish

Paraguay Tetras are social schooling fish and should always be kept in groups.

Housing with aggressive species

Avoid keeping them with large or territorial fish that may cause stress.

Poor water quality

Regular water changes and stable water parameters are essential for long-term health.

Overfeeding

Feed small amounts once or twice daily to prevent excess waste and maintain water quality.

Overcrowding the aquarium

Provide plenty of open swimming space while incorporating plants and décor for shelter.