Molly and Weather Loach Compatibility Overview
Molly 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 | Molly | Weather Loach | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 50โ77ยฐF | โ 72โ77ยฐF |
| pH Range | 7.5โ8.5 | 6.0โ8.0 | โ ๏ธ 7.5โ8.0 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 4 in | 11.0 in | โ ๏ธ 2.8ร difference |
| Min. Group | 3+ | 3+ | See below |
| Min. Tank Size | 100 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.
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 Molly live with Weather Loach?
With significant caution and a larger tank. Molly 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 Molly and Weather Loach together?
A minimum of 100 gallons is recommended for keeping Molly and Weather Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Molly and Weather Loach?
72โ77ยฐF โ inside Molly's 72โ82ยฐF and Weather Loach's 50โ77ยฐF.
Is a Molly aggressive toward a Weather Loach?
Molly is peaceful and Weather Loach is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Molly 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. |