Compatibility
Celestial Pearl Danio × Harlequin rasbora Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Celestial Pearl Danio and Harlequin rasbora can live together in a well-planted community tank, but size difference should be monitored and water-parameter overlap should be checked carefully.
TemperatureB
pHC
HardnessB
FlowA
PredationB
BehaviourA
Compatible with cautionB
Envrionmental Factors
Temperature overlap
Celestial Pearl Danio: 15.0–24.0 °C
Harlequin rasbora: 22.0–26.0 °C
Shared window: 22.0–24.0°C.
pH overlap
Celestial Pearl Danio: 7.0–8.0
Harlequin rasbora: 5.0–7.2
Shared window: 7.0–7.2.
Hardness overlap
Celestial Pearl Danio: Medium → Hard
Harlequin rasbora: Very soft → Medium
Shared hardness bands: 1 (overlap ratio 50%).
Flow match
Celestial Pearl Danio: Low
Harlequin rasbora: Low
Flow preferences do not conflict directly (no low-vs-high clash).
Behavioural Factors
Predation risk (size ratio)
Adult size ratio: 2.38x
Size gap is between 2.0x and 3.0x, so monitor for dominance and mouth-fit risk.
Behaviour risk
- - Both species are generally peaceful; behaviour conflict risk is low.
Parameter snapshot
| Parameter | Celestial Pearl Danio | Harlequin rasbora |
|---|---|---|
| Adult size | 2.1 cm | 5.0 cm |
| Temperature | 15.0–24.0 °C | 22.0–26.0 °C |
| pH | 7.0–8.0 | 5.0–7.2 |
| Hardness | Medium → Hard | Very soft → Medium |
| Flow | Low | Low |
| Locations | Myanmar | Indonesia |
Geographic overlap (supporting signal)
No recorded overlap in our dataset.
Best tank mates for Celestial Pearl Danio
Reference links to curated compatibility pair pages for this species.
Emerald Dwarf Rasbora
Danio erythromicron
Head and Tail Light Tetra
Holopristis ocellifera
Honey Gourami
Trichogaster chuna
Neon tetra
Paracheirodon innesi
Best tank mates for Harlequin rasbora
Reference links to curated compatibility pair pages for this species.
Cardinal Tetra
Paracheirodon axelrodi
Chili Rasbora
Boraras brigittae
Corydoras
Corydoras spp.
Dwarf Rasbora
Boraras maculatus