Can Cardinal Tetra and Cuckoo Synodontis live together?

Cardinal Tetra and Cuckoo Synodontis 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 Cuckoo Synodontis

Cardinal Tetra

Paracheirodon axelrodi

Cuckoo Synodontis

Synodontis multipunctatus

Verdict:Possible with care

Side-by-side specs

Tetras

Family

Catfish

2″

Adult size

5″

20gal

Min tank

55gal

73–81°F

Temperature

75–81°F

4.5–7

7.8–9

peaceful

Temperament

semi-aggressive

Schooling

mid

Water level

bottom

Compatibility notes

warnCardinal Tetra prefers pH 4.5–7, Cuckoo Synodontis prefers 7.8–9 — water chemistry mismatch.

Try both in the builder →Compare different species