Compatibility
Betta × Cardinal Tetra Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Betta and Cardinal Tetra can live together in a well-planted community tank, but territorial behaviour should be monitored.
TemperatureA
pHB
HardnessA
FlowA
PredationA
BehaviourB
Compatible with cautionB
Envrionmental Factors
Temperature overlap
Betta: 24.0–30.0 °C
Cardinal Tetra: 23.0–27.0 °C
Shared window: 24.0–27.0°C.
pH overlap
Betta: 6.0–7.5
Cardinal Tetra: 5.0–7.0
Shared window: 6.0–7.0.
Hardness overlap
Betta: Very soft → Medium
Cardinal Tetra: Very soft → Soft
Shared hardness bands: 2 (overlap ratio 100%).
Flow match
Betta: Low
Cardinal Tetra: Low
Flow preferences do not conflict directly (no low-vs-high clash).
Behavioural Factors
Predation risk (size ratio)
Adult size ratio: 1.71x
Adult size gap is under 2.0x, which is usually a safer ratio.
Behaviour risk
- - Betta: Territorial.
- - At least one species can be pushy or fin-nippy; monitor closely.
- - Behaviour may vary by tank size and stocking; have a backup plan.
Parameter snapshot
| Parameter | Betta | Cardinal Tetra |
|---|---|---|
| Adult size | 6.0 cm | 3.5 cm |
| Temperature | 24.0–30.0 °C | 23.0–27.0 °C |
| pH | 6.0–7.5 | 5.0–7.0 |
| Hardness | Very soft → Medium | Very soft → Soft |
| Flow | Low | Low |
| Locations | Cambodia, Thailand | South America |
Geographic overlap (supporting signal)
No recorded overlap in our dataset.
Best tank mates for Cardinal Tetra
Reference links to curated compatibility pair pages for this species.
Chili Rasbora
Boraras brigittae
Corydoras
Corydoras spp.
Dwarf Rasbora
Boraras maculatus
Ember Tetra
Hyphessobrycon amandae