Can Guppy live with Yucatan Molly?
Caution — with care
Why
- Yucatan Molly may eat Guppy; add only full-grown adults, because juveniles and fry will be picked off.
- Only a narrow pH overlap — keep both around 7.5–7.8.
Sweet spot: both do well at 72–82°F and pH 7.5–7.8 — aim there.
Side-by-side
| Guppy | Yucatan Molly | |
|---|---|---|
| Temperature | 72–82°F | 72–82°F |
| pH | 6.8–7.8 | 7.5–8.5 |
| Hardness (GH) | 8–20 dGH | 15–30 dGH |
| Adult size | 2" | 6" |
| Temperament | Peaceful | Peaceful |
| Min tank | 10 gal | 40 gal |
Together, plan on at least 40 gallons.
How to make it work
- Add only full-grown adults — never juveniles, which will be eaten.
- Target the overlapping water-parameter range and acclimate slowly.
Where to buy
- Guppy: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Yucatan Molly: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Live-animal shipping: add a heat pack below 50°F, expect weather holds above 90°F, and schedule delivery for a moderate week when someone can receive it promptly.
Build a full tank around this stocking →Everything compatible with Guppy · …with Yucatan Molly