Can Bearded Cory and Sailfin Molly Live Together?

Bearded Cory is a peaceful species (2/10), while Sailfin Molly is generally mild-mannered (3/10). This modest difference means Sailfin Molly may occasionally assert dominance over Bearded Cory.

Bearded Cory and Sailfin Molly both frequent the Bottom (Substrate) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

The safe temperature window for both species falls between 22°C and 23°C. Aim for the midpoint of this range (around 22.5°C) for optimal comfort.

The pH requirements of Bearded Cory (6–7.4) and Sailfin Molly (7.5–8.5) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Bearded Cory needs 2–12 dGH while Sailfin Molly requires 15–30 dGH.

To house Bearded Cory and Sailfin Molly together, plan for an aquarium of at least 110 litres with a minimum length of 90 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Sand (Sifters), Established Algae (Otocinclus), Plants - Densely covered. Meeting these requirements will help both species thrive.

Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.

Bearded Cory and Sailfin Molly are the kind of pair that can look acceptable in a shop but become a maintenance problem at home. The main risk is not a single number in the chart; it is the way incompatible behavior, water needs, or pressure on space compounds over time once both fish are established in the same tank.