Glowlight Tetra and Molly Compatibility Overview
Glowlight Tetra and Molly 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 | Glowlight Tetra | Molly | Verdict |
|---|---|---|---|
| Temperature | 75โ82ยฐF | 72โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 5.5โ7.5 | 7.5โ8.5 | โ ๏ธ 7.5โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.6 in | 4 in | โ ๏ธ 2.5ร difference |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Glowlight Tetra โ Hemigrammus erythrozonus
The Glowlight Tetra is a vibrant, peaceful community fish known for its silver body and bright red-gold highlights. It thrives in a well-planted tank with plenty of swimming space and a gentle water flow. These tetras are easy to care for and are suitable for beginners.
โ Full Glowlight 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 Glowlight Tetra live with Molly?
With significant caution and a larger tank. Glowlight Tetra and Molly 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 Glowlight Tetra and Molly together?
A minimum of 55 gallons is recommended for keeping Glowlight Tetra and Molly together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Glowlight Tetra and Molly?
75โ82ยฐF โ inside Glowlight Tetra's 75โ82ยฐF and Molly's 72โ82ยฐF.
Is a Glowlight Tetra aggressive toward a Molly?
Glowlight Tetra is peaceful and Molly is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Glowlight 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. |