Can Pygmy Cory live with Yucatan Molly?
Caution — with care
Why
- No overlapping water hardness: Pygmy Cory wants 2–12 dGH but Yucatan Molly wants 15–30 dGH.
- Very different sizes (Yucatan Molly 6" vs Pygmy Cory 1") — these two need different tanks, and the smaller fish will be out-competed at feeding time.
- Only a narrow pH overlap — keep both around 7.5–7.5.
Sweet spot: both do well at 72–79°F and pH 7.5–7.5 — aim there.
Side-by-side
| Pygmy Cory | Yucatan Molly | |
|---|---|---|
| Temperature | 72–79°F | 72–82°F |
| pH | 6–7.5 | 7.5–8.5 |
| Hardness (GH) | 2–12 dGH | 15–30 dGH |
| Adult size | 1" | 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.
Sort it with: GH remineraliser · A larger tank
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Design a tank with Pygmy Cory, Yucatan Molly →Everything compatible with Pygmy Cory · …with Yucatan Molly