Compatibility
Guppy × Swordtail Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Guppy and Swordtail can usually live together in a well-planted community tank, but size difference should be monitored.
TemperatureB
pHA
HardnessA
FlowA
PredationB
BehaviourA
Data coverage note: 1 key check marked unknown.
Generally compatibleA
Envrionmental Factors
Temperature overlap
Guppy: 20.0–28.0 °C
Swordtail: -
One or both species are missing range data for this check.
pH overlap
Guppy: 7.0–8.0
Swordtail: 7.0–8.0
Shared window: 7.0–8.0.
Hardness overlap
Guppy: Medium → Very hard
Swordtail: Medium → Hard
Shared hardness bands: 2 (overlap ratio 100%).
Flow match
Guppy: Medium
Swordtail: Medium
Flow preferences do not conflict directly (no low-vs-high clash).
Behavioural Factors
Predation risk (size ratio)
Adult size ratio: 2.80x
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 | Guppy | Swordtail |
|---|---|---|
| Adult size | 5.0 cm | 14.0 cm |
| Temperature | 20.0–28.0 °C | - |
| pH | 7.0–8.0 | 7.0–8.0 |
| Hardness | Medium → Very hard | Medium → Hard |
| Flow | Medium | Medium |
| Locations | South America, Barbados | Central America |
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
Best tank mates for Swordtail
Reference links to curated compatibility pair pages for this species.
Common Molly
Poecilia sphenops
Platy
Xiphophorus maculatus