Compatibility Overview
Angelfish and Discus can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.
| Factor | Angelfish | Discus | Verdict |
|---|---|---|---|
| Temperature | 74–84°F | 82–88°F | ⚠️ 82–84°F (narrow) |
| pH Range | 6.0–7.5 | 5.0–7.0 | ✅ 6.0–7.0 |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 6 in | 8 in | ✅ Similar |
| Min. Group | 1+ | 5+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
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.
Discus — Symphysodon spp.
The 'king of the aquarium' — beautiful but demanding. Requires very warm, soft, acidic water that excludes most community fish.
Frequently Asked Questions
Can Angelfish live with Discus?
With significant caution and a larger tank. Angelfish and Discus can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Angelfish and Discus together?
A minimum of 100 gallons is recommended for keeping Angelfish and Discus together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Angelfish and Discus?
82–84°F (narrow)
Is a Angelfish aggressive toward a Discus?
Angelfish is semi and Discus is semi. Narrow temperature overlap (82–84°F) — keeping the tank at exactly 83–83°F is needed for both species.