Ruby Tetra

Axelrodia riesei

A tiny, deep-red nano tetra for soft, acidic blackwater tanks.

Water

Freshwater

Temperature

74–82°F

pH

4.5–6.8

Hardness

1–8 dGH

Max size

0.8 in

Min tank

10 gal

Temperament

Peaceful

Social

Schooling (8+)

Swim level

Mid

Diet

Omnivore

Care level

Intermediate

Lifespan

2-3 years

Breeding

Egg-scatterer

Suitability

Common

Origin

South America (Colombia)

One of the smallest tetras, glowing ruby-red in soft, tannin-stained water. Needs micro-foods and a tight group of eight or more. Excellent in shrimp-safe nano aquascapes.