Species Comparison
Cardinal Tetra vs Cuckoo Catfish
Verdict:Possible with care
Side-by-side specs
Tetras
Family
Catfish
2″
Adult size
4″
20gal
Min tank
30gal
73–81°F
Temperature
75–81°F
4.5–7
pH
7.5–8.5
peaceful
Temperament
peaceful
6+
Schooling
3+
mid
Water level
bottom
Compatibility notes
- warnCardinal Tetra prefers pH 4.5–7, Cuckoo Catfish prefers 7.5–8.5 — water chemistry mismatch.