Compatibility
Guppy × Cardinal Tetra Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Guppy and Cardinal Tetra are not recommended together in most community setups, but water-parameter overlap should be checked carefully.
TemperatureA
pHC
HardnessC
FlowA
PredationA
BehaviourA
Not recommendedC
Envrionmental Factors
Temperature overlap
Guppy: 20.0–28.0 °C
Cardinal Tetra: 23.0–27.0 °C
Shared window: 23.0–27.0°C.
pH overlap
Guppy: 7.0–8.0
Cardinal Tetra: 5.0–7.0
Shared window: 7.0–7.0.
Hardness overlap
Guppy: Medium → Very hard
Cardinal Tetra: Very soft → Soft
No shared hardness band is present.
Flow match
Guppy: Medium
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 | Guppy | Cardinal Tetra |
|---|---|---|
| Adult size | 5.0 cm | 3.5 cm |
| Temperature | 20.0–28.0 °C | 23.0–27.0 °C |
| pH | 7.0–8.0 | 5.0–7.0 |
| Hardness | Medium → Very hard | Very soft → Soft |
| Flow | Medium | Low |
| Locations | South America, Barbados | South America |
Geographic overlap (supporting signal)
Shared: South America
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
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