Molly and Pea Puffer Compatibility Overview
Molly and Pea Puffer 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 55 gallons), dense planting, and close monitoring are essential.
| Factor | Molly | Pea Puffer | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 74โ82ยฐF | โ 74โ82ยฐF |
| pH Range | 7.5โ8.5 | 7.0โ8.0 | โ ๏ธ 7.5โ8.0 (narrow) |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 4 in | 1 in | โ 4ร difference |
| Min. Group | 3+ | 1+ | 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.
Pea Puffer โ Carinotetraodon travancoricus
World's smallest pufferfish โ intensely territorial and nippy despite tiny size. Will attack fins and eat shrimp and snails.
Frequently Asked Questions
Can Molly live with Pea Puffer?
With significant caution and a larger tank. Molly and Pea Puffer 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 55 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Molly and Pea Puffer together?
A minimum of 55 gallons is recommended for keeping Molly and Pea Puffer together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Molly and Pea Puffer?
74โ82ยฐF โ inside Molly's 72โ82ยฐF and Pea Puffer's 74โ82ยฐF.
Is a Molly aggressive toward a Pea Puffer?
Molly is peaceful and Pea Puffer is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Molly and Pea Puffer
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. |