Molly and Neon Tetra Compatibility Overview
Molly and Neon Tetra can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
| Factor | Molly | Neon Tetra | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ80ยฐF | โ 72โ80ยฐF |
| pH Range | 7.5โ8.5 | 6.0โ7.5 | โ ๏ธ 7.5โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 4 in | 1.5 in | โ ๏ธ 2.7ร difference |
| Min. Group | 3+ | 6+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Molly โ Poecilia sphenops
Hardy livebearers that prefer alkaline, hard water โ sometimes slightly brackish. Prolific breeders; peaceful community fish.
Neon Tetra โ Paracheirodon innesi
Iconic schooling fish with vivid electric-blue and red stripes. Hardy in captivity; suitable for most peaceful community setups.
Frequently Asked Questions
Can Molly live with Neon Tetra?
With significant caution and a larger tank. Molly and Neon Tetra can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Molly and Neon Tetra together?
A minimum of 55 gallons is recommended for keeping Molly and Neon Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Molly and Neon Tetra?
72โ80ยฐF โ inside Molly's 72โ82ยฐF and Neon Tetra's 72โ80ยฐF.
Is a Molly aggressive toward a Neon Tetra?
Molly is peaceful and Neon Tetra is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Molly and Neon Tetra
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |