Bristlenose Pleco and Cardinal Tetra Compatibility Overview
Bristlenose Pleco and Cardinal Tetra can potentially coexist, but the combination requires careful attention. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
| Factor | Bristlenose Pleco | Cardinal Tetra | Verdict |
|---|---|---|---|
| Temperature | 60โ80ยฐF | 73โ82ยฐF | โ 73โ80ยฐF |
| pH Range | 6.5โ7.5 | 4.5โ7.0 | โ ๏ธ 6.5โ7.0 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 5 in | 1.5 in | โ ๏ธ 3.3ร difference |
| Min. Group | 1+ | 6+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Bristlenose Pleco โ Ancistrus sp.
Hardy armoured catfish that grazes on algae. Peaceful with virtually all species; tolerates a wide temperature range.
โ Full Bristlenose Pleco care guide
Cardinal Tetra โ Paracheirodon axelrodi
Brilliant red-and-blue schooling fish from the Rio Negro. Prefers soft, acidic, warm water โ a natural companion for discus.
Frequently Asked Questions
Can Bristlenose Pleco live with Cardinal Tetra?
With significant caution and a larger tank. Bristlenose Pleco and Cardinal Tetra can potentially coexist, but the combination requires careful attention. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Bristlenose Pleco and Cardinal Tetra together?
A minimum of 75 gallons is recommended for keeping Bristlenose Pleco and Cardinal Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Bristlenose Pleco and Cardinal Tetra?
73โ80ยฐF โ inside Bristlenose Pleco's 60โ80ยฐF and Cardinal Tetra's 73โ82ยฐF.
Is a Bristlenose Pleco aggressive toward a Cardinal Tetra?
Bristlenose Pleco is peaceful and Cardinal Tetra is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Bristlenose Pleco and Cardinal Tetra
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |