Compatibility Overview
Discus and Zebra Danio 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 | Discus | Zebra Danio | Verdict |
|---|---|---|---|
| Temperature | 82–88°F | 64–82°F | ⚠️ 82–82°F (narrow) |
| pH Range | 5.0–7.0 | 6.5–8.0 | ⚠️ 6.5–7.0 (narrow) |
| Temperament | semi | peaceful | ⚠️ Monitor |
| Adult Size | 8 in | 2 in | ❌ 4× difference |
| Min. Group | 5+ | 5+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Discus — Symphysodon spp.
The 'king of the aquarium' — beautiful but demanding. Requires very warm, soft, acidic water that excludes most community fish.
Zebra Danio — Danio rerio
Extremely hardy, fast-moving schooling fish tolerant of a wide temperature range. Active top-to-mid swimmers compatible with most community fish.
Frequently Asked Questions
Can Discus live with Zebra Danio?
Generally not recommended. Discus and Zebra Danio 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 Discus and Zebra Danio together?
A minimum of 100 gallons is recommended for keeping Discus and Zebra Danio together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Discus and Zebra Danio?
82–82°F (narrow)
Is a Discus aggressive toward a Zebra Danio?
Discus is semi and Zebra Danio is peaceful. Minimal temperature overlap (82–82°F) — difficult to satisfy both species simultaneously.