Can Cardinal Tetra and Tapajos Red Head live together?

Cardinal Tetra and Tapajos Red Head 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 Tapajos Red Head

Cardinal Tetra

Paracheirodon axelrodi

Tapajos Red Head

Geophagus sp. Tapajos

Verdict:Possible with care

Side-by-side specs

Tetras

Family

Cichlids

2″

Adult size

6″

20gal

Min tank

75gal

73–81°F

Temperature

78–84°F

4.5–7

5.5–7

peaceful

Temperament

peaceful

Schooling

mid

Water level

bottom

Compatibility notes

warnCardinal Tetra and Tapajos Red Head only narrowly overlap in temperature — keep within 78–81°F.

Try both in the builder →Compare different species