Compatibility
Ram × Freshwater Angelfish Compatibility
Compatibility calculated based on predation risk, behaviour profile, and water-parameter overlap.
Ram and Freshwater Angelfish are not recommended together in most community setups, but territorial behaviour should be monitored and water-parameter overlap should be checked carefully.
TemperatureA
pHC
HardnessB
FlowA
PredationA
BehaviourC
Not recommendedC
Envrionmental Factors
Temperature overlap
Ram: 26.0–30.0 °C
Freshwater Angelfish: 24.0–30.0 °C
Shared window: 26.0–30.0°C.
pH overlap
Ram: 5.5–7.0
Freshwater Angelfish: 6.8–7.8
Shared window: 6.8–7.0.
Hardness overlap
Ram: Very soft → Soft
Freshwater Angelfish: Soft → Medium
Shared hardness bands: 1 (overlap ratio 50%).
Flow match
Ram: Low
Freshwater Angelfish: Medium
Flow preferences do not conflict directly (no low-vs-high clash).
Behavioural Factors
Predation risk (size ratio)
Adult size ratio: 1.71x
Adult size gap is under 2.0x, which is usually a safer ratio.
Behaviour risk
- - Ram: Territorial.
- - Freshwater Angelfish: Territorial.
- - Freshwater Angelfish: Predatory.
- - Both species show territorial or semi-aggressive behaviour; conflicts are likely.
Parameter snapshot
| Parameter | Ram | Freshwater Angelfish |
|---|---|---|
| Adult size | 7.0 cm | 12.0 cm |
| Temperature | 26.0–30.0 °C | 24.0–30.0 °C |
| pH | 5.5–7.0 | 6.8–7.8 |
| Hardness | Very soft → Soft | Soft → Medium |
| Flow | Low | Medium |
| Locations | South America | South America |
Geographic overlap (supporting signal)
Shared: South America