🐠 Aquastock
HomeCompatibility › Cardinal Tetra & Discus

Can Cardinal Tetra and Discus Live Together?

Not recommended
  • Temperature ranges do not overlap (Cardinal Tetra: 73-81°F vs Discus: 82-88°F).
  • Shared pH window: 5.5-7.0.

Side-by-side

ParameterCardinal TetraDiscus
Adult size2"8"
Min tank20 gal55 gal
Temperature73-81°F82-88°F
pH5.5-75.5-7
TemperamentPeacefulPeaceful
DietOmnivoreCarnivore

Recommended shared tank: 55 gallons or larger. Target pH 5.5-7.0.

FAQ

Can Cardinal Tetra and Discus live together?

Not recommended. Temperature ranges do not overlap (Cardinal Tetra: 73-81°F vs Discus: 82-88°F).

What size tank do Cardinal Tetra and Discus need together?

Plan for at least 55 gallons, more if you keep schooling groups of either species.

See full care guides: Cardinal Tetra · Discus