Diamond Tetra and Molly Compatibility Overview
Diamond Tetra and Molly can potentially coexist, but the combination requires careful attention. Their pH ranges do not meet: Diamond Tetra wants 5.5โ7.0 and Molly wants 7.5โ8.5. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
| Factor | Diamond Tetra | Molly | Verdict |
|---|---|---|---|
| Temperature | 75โ82ยฐF | 72โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 5.5โ7.0 | 7.5โ8.5 | โ No overlap |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.4 in | 4 in | โ Similar |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Diamond Tetra โ Moenkhausia pittieri
The Diamond Tetra is a popular freshwater fish known for its vibrant colors and peaceful nature. It is well-suited for community tanks and can thrive in a variety of water conditions. With a moderate activity level and a preference for schools, this species is a great addition to any beginner or intermediate aquarist's tank.
โ Full Diamond Tetra care guide
Molly โ Poecilia sphenops
Hardy livebearers that prefer alkaline, hard water โ sometimes slightly brackish. Prolific breeders; peaceful community fish.
Frequently Asked Questions
Can Diamond Tetra live with Molly?
With significant caution and a larger tank. Diamond Tetra and Molly can potentially coexist, but the combination requires careful attention. Their pH ranges do not meet: Diamond Tetra wants 5.5โ7.0 and Molly wants 7.5โ8.5. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Diamond Tetra and Molly together?
A minimum of 55 gallons is recommended for keeping Diamond Tetra and Molly together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Diamond Tetra and Molly?
75โ82ยฐF โ inside Diamond Tetra's 75โ82ยฐF and Molly's 72โ82ยฐF.
Is a Diamond Tetra aggressive toward a Molly?
Diamond Tetra is peaceful and Molly is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Diamond Tetra and Molly
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. |