Compatibility Overview
Angelfish and Bolivian Ram are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Angelfish | Bolivian Ram | Verdict |
|---|---|---|---|
| Temperature | 74–84°F | 72–82°F | ✅ 74–82°F |
| pH Range | 6.0–7.5 | 6.5–7.5 | ✅ 6.5–7.5 |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 6 in | 2.0 in | ⚠️ 3.0× difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Angelfish — Pterophyllum scalare
Elegant South American cichlids with long flowing fins. Generally peaceful but territorial when breeding and will eat very small fish.
Bolivian Ram — Aquarium species
The Bolivian Ram is a popular freshwater fish known for its vibrant colors and peaceful nature. They are well-suited for community tanks with other peaceful species. These fish are relatively easy to care for, making them a great choice for beginners. They require a well-maintained tank with a moderate water flow and plenty of space for swimming.
Frequently Asked Questions
Can Angelfish live with Bolivian Ram?
Generally not recommended. Angelfish and Bolivian Ram are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Angelfish and Bolivian Ram together?
A minimum of 55 gallons is recommended for keeping Angelfish and Bolivian Ram together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Angelfish and Bolivian Ram?
74–82°F
Is a Angelfish aggressive toward a Bolivian Ram?
Angelfish is semi and Bolivian Ram is semi. The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 80/100 |
| Ph | 100/100 |
| Temperament | 62/100 |
| Adult Size | 38/100 |
| Swim Zone | 68/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 100 gal | Best when keeping larger schools or reducing territorial pressure. |