Can Cardinal Tetra and Madagascar Rainbow live together?

Cardinal Tetra and Madagascar Rainbow are possible with care. The comparison on this page runs the same compatibility engine as the tank builder, checking temperature and pH overlap, predation by size, temperament, and known hard-pair conflicts.

Species Comparison

Cardinal Tetra vs Madagascar Rainbow

Cardinal Tetra

Paracheirodon axelrodi

Madagascar Rainbow

Bedotia geayi

Verdict:Possible with care

Side-by-side specs

Tetras

Family

Rainbowfish

2″

Adult size

4″

20gal

Min tank

30gal

73–81°F

Temperature

68–75°F

4.5–7

7–8

peaceful

Temperament

peaceful

Schooling

mid

Water level

mid

Compatibility notes

warnCardinal Tetra and Madagascar Rainbow only narrowly overlap in temperature — keep within 73–75°F.

Try both in the builder →Compare different species