Compatibility
Betta × Guppy Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Betta and Guppy can live together in a well-planted community tank, but territorial behaviour should be monitored and water-parameter overlap should be checked carefully.
TemperatureB
pHB
HardnessC
FlowA
PredationA
BehaviourB
Compatible with cautionB
Envrionmental Factors
Temperature overlap
Betta: 24.0–30.0 °C
Guppy: 20.0–28.0 °C
Shared window: 24.0–28.0°C.
pH overlap
Betta: 6.0–7.5
Guppy: 7.0–8.0
Shared window: 7.0–7.5.
Hardness overlap
Betta: Very soft → Medium
Guppy: Medium → Very hard
Shared hardness bands: 1 (overlap ratio 33%).
Flow match
Betta: Low
Guppy: Medium
Flow preferences do not conflict directly (no low-vs-high clash).
Behavioural Factors
Predation risk (size ratio)
Adult size ratio: 1.20x
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 | Guppy |
|---|---|---|
| Adult size | 6.0 cm | 5.0 cm |
| Temperature | 24.0–30.0 °C | 20.0–28.0 °C |
| pH | 6.0–7.5 | 7.0–8.0 |
| Hardness | Very soft → Medium | Medium → Very hard |
| Flow | Low | Medium |
| Locations | Cambodia, Thailand | South America, Barbados |
Geographic overlap (supporting signal)
No recorded overlap in our dataset.
Best tank mates for Guppy
Reference links to curated compatibility pair pages for this species.
Common Molly
Poecilia sphenops
Endler's livebearer
Poecilia wingei
Platy
Xiphophorus maculatus
Swordtail
Xiphophorus hellerii