Can Guppy live with Yucatan Molly?
Light caution
Why
- Only a narrow pH overlap — keep both around 7.5–7.8.
- Large size gap (Yucatan Molly 6" vs Guppy 2") — watch that the smaller one gets its share at feeding time.
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
- Target the overlapping water-parameter range and acclimate slowly.
Design the whole tank, not just the stocking
Skapelab plans a complete, buildable planted aquarium around your fish — a hand-illustrated layout, the exact plants and hardscape, a placement map, and a full equipment and shopping list. Free.
Design a tank with Guppy, Yucatan Molly →Everything compatible with Guppy · …with Yucatan Molly