Compatibility
Harlequin rasbora × Cardinal Tetra Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Harlequin rasbora and Cardinal Tetra can usually live together in a well-planted community tank.
TemperatureA
pHA
HardnessA
FlowA
PredationA
BehaviourA
Generally compatibleA
Envrionmental Factors
Temperature overlap
Harlequin rasbora: 22.0–26.0 °C
Cardinal Tetra: 23.0–27.0 °C
Shared window: 23.0–26.0°C.
pH overlap
Harlequin rasbora: 5.0–7.2
Cardinal Tetra: 5.0–7.0
Shared window: 5.0–7.0.
Hardness overlap
Harlequin rasbora: Very soft → Medium
Cardinal Tetra: Very soft → Soft
Shared hardness bands: 2 (overlap ratio 100%).
Flow match
Harlequin rasbora: Low
Cardinal Tetra: Low
Flow preferences do not conflict directly (no low-vs-high clash).
Behavioural Factors
Predation risk (size ratio)
Adult size ratio: 1.43x
Adult size gap is under 2.0x, which is usually a safer ratio.
Behaviour risk
- - Both species are generally peaceful; behaviour conflict risk is low.
Parameter snapshot
| Parameter | Harlequin rasbora | Cardinal Tetra |
|---|---|---|
| Adult size | 5.0 cm | 3.5 cm |
| Temperature | 22.0–26.0 °C | 23.0–27.0 °C |
| pH | 5.0–7.2 | 5.0–7.0 |
| Hardness | Very soft → Medium | Very soft → Soft |
| Flow | Low | Low |
| Locations | Indonesia | South America |
Geographic overlap (supporting signal)
No recorded overlap in our dataset.
Best tank mates for Harlequin rasbora
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
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