Compatibility Overview
Bristlenose Pleco and Discus 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 | Bristlenose Pleco | Discus | Verdict |
|---|---|---|---|
| Temperature | 60–80°F | 82–88°F | ❌ No overlap |
| pH Range | 6.5–7.5 | 5.0–7.0 | ⚠️ 6.5–7.0 (narrow) |
| Temperament | peaceful | semi | ⚠️ Monitor |
| Adult Size | 5 in | 8 in | ✅ Similar |
| Min. Group | 1+ | 5+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Bristlenose Pleco — Ancistrus sp.
Hardy armoured catfish that grazes on algae. Peaceful with virtually all species; tolerates a wide temperature range.
→ Full Bristlenose Pleco care guide
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 Bristlenose Pleco live with Discus?
Generally not recommended. Bristlenose Pleco and Discus 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 Bristlenose Pleco and Discus together?
A minimum of 100 gallons is recommended for keeping Bristlenose Pleco and Discus together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Bristlenose Pleco and Discus?
No overlap
Is a Bristlenose Pleco aggressive toward a Discus?
Bristlenose Pleco is peaceful and Discus is semi. Temperature ranges do not overlap: Bristlenose Pleco needs 60–80°F; Discus needs 82–88°F.