Compatibility Overview
Discus and Tiger Barb 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 | Tiger Barb | Verdict |
|---|---|---|---|
| Temperature | 82–88°F | 68–79°F | ❌ No overlap |
| pH Range | 5.0–7.0 | 6.0–8.0 | ✅ 6.0–7.0 |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 8 in | 2.75 in | ⚠️ 2.9× difference |
| Min. Group | 5+ | 6+ | 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.
Tiger Barb — Puntigrus tetrazona
Striking striped barbs that are notorious fin-nippers. Must be kept in groups of 6+ to redirect aggression within the school. Incompatible with long-finned fish.
Frequently Asked Questions
Can Discus live with Tiger Barb?
Generally not recommended. Discus and Tiger Barb 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 Tiger Barb together?
A minimum of 100 gallons is recommended for keeping Discus and Tiger Barb together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Discus and Tiger Barb?
No overlap
Is a Discus aggressive toward a Tiger Barb?
Discus is semi and Tiger Barb is semi. Temperature ranges do not overlap: Discus needs 82–88°F; Tiger Barb needs 68–79°F.