Can Swordtail live with Yucatan Molly?
Light caution
Why
- Swordtail is semi-aggressive — give the peaceful Yucatan Molly plenty of space, cover and broken sight lines.
Sweet spot: both do well at 72–82°F and pH 7.5–8.4 — aim there.
Side-by-side
| Swordtail | Yucatan Molly | |
|---|---|---|
| Temperature | 72–82°F | 72–82°F |
| pH | 7–8.4 | 7.5–8.5 |
| Hardness (GH) | 12–30 dGH | 15–30 dGH |
| Adult size | 5.5" | 6" |
| Temperament | Semi-aggressive | Peaceful |
| Min tank | 29 gal | 40 gal |
Together, plan on at least 40 gallons.
How to make it work
- Use a larger, well-decorated tank with sightline breaks, keep everyone well-fed, and add the calmer fish first.
Sort it with: GH remineraliser
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Design a tank with Swordtail, Yucatan Molly →Everything compatible with Swordtail · …with Yucatan Molly