Aqua Tools

Compatibility check

Can Molly and Pygmy cory live together?

Molly and Pygmy cory are not recommended together based on the current rule check.

not recommended

Quick answer

This pairing is not recommended by the current rules. The highest-risk factors are marked as fail below; fixable water-parameter overlap alone does not cancel out predation, aggression, fin-nipping, or explicit avoid-tag conflicts.

Factor breakdown

Factor Result Explanation
Water type OK Molly is freshwater; Pygmy cory is freshwater. Compatibility pages are generated only for matching water types.
Temperature OK Temperature overlaps at 24-26 C. Molly is listed at 24-28 C; Pygmy cory is listed at 22-26 C.
pH OK pH overlaps at 7.2-7.5. Molly is listed at 7.2-8.5; Pygmy cory is listed at 6-7.5.
Hardness Caution Hardness overlaps at 12-12 dGH. Molly is listed at 12-30 dGH; Pygmy cory is listed at 2-12 dGH.
Adult size and predation Caution Adult size differs substantially (Molly: 10 cm; Pygmy cory: 3.2 cm). Add cover and avoid housing juveniles with adults.
Temperament and aggression OK Molly (peaceful livebearer) and Pygmy cory (peaceful nano schooling) do not have an obvious aggression clash in the dataset.
Fin nipping risk OK The dataset does not flag this pair as a fin-nipper plus long-finned combination.
Schooling and group needs Caution Plan around full groups, not single display fish. Minimum group sizes: Molly: 3+; Pygmy cory: 8+.
Explicit avoid tags Conflict Avoid-tag conflict found. Molly avoid tags matching Pygmy cory: timid-nano-fish. Pygmy cory avoid tags matching Molly: none.
Minimum combined tank size OK Use at least 30 US gallons (114 L) for the pair, based on the larger minimum tank plus bioload and activity adjustments where relevant.

Species profiles

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Sources and attribution

Source links are verification references for taxonomy and identifiers. Care values are AI-generated from common hobby consensus and need expert review.