Cardinal Tetra and Weather Loach Compatibility Overview
Cardinal Tetra and Weather Loach 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 100 gallons), dense planting, and close monitoring are essential.
| Factor | Cardinal Tetra | Weather Loach | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 50โ77ยฐF | โ 73โ77ยฐF |
| pH Range | 4.5โ7.0 | 6.0โ8.0 | โ 6.0โ7.0 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.5 in | 11.0 in | โ 7ร difference |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
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.
โ Full Cardinal Tetra care guide
Weather Loach โ Misgurnus anguillicaudatus
The Weather Loach, also known as the Weather Fish, is a popular addition to freshwater aquariums due to its peaceful nature and intriguing behavior. It has a slender, eel-like body with a translucent appearance and dark spots. These loaches are active and enjoy exploring their tank, making them a moderate activity level fish.
Frequently Asked Questions
Can Cardinal Tetra live with Weather Loach?
With significant caution and a larger tank. Cardinal Tetra and Weather Loach 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 100 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Cardinal Tetra and Weather Loach together?
A minimum of 100 gallons is recommended for keeping Cardinal Tetra and Weather Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Weather Loach?
73โ77ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Weather Loach's 50โ77ยฐF.
Is a Cardinal Tetra aggressive toward a Weather Loach?
Cardinal Tetra is peaceful and Weather Loach is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Weather Loach
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |