Can Molly (Sailfin/Black/Dalmatian) and Parrot Cichlid Live Together?

Molly (Sailfin/Black/Dalmatian) is a generally mild-mannered species (3/10), while Parrot Cichlid is semi-aggressive (7/10). This notable difference means Parrot Cichlid may occasionally assert dominance over Molly (Sailfin/Black/Dalmatian).

Molly (Sailfin/Black/Dalmatian) and Parrot Cichlid both frequent the Middle (Open Water) 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 26°C and 28°C. Aim for the midpoint of this range (around 27.0°C) for optimal comfort.

The pH requirements of Molly (Sailfin/Black/Dalmatian) (7.5–8.5) and Parrot Cichlid (5.5–7.2) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Molly (Sailfin/Black/Dalmatian) needs 12–30 dGH while Parrot Cichlid requires 1–8 dGH.

To house Molly (Sailfin/Black/Dalmatian) and Parrot Cichlid together, plan for an aquarium of at least 450 litres with a minimum length of 150 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: Plants - Densely covered, Established Algae (Otocinclus), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Sand (Sifters). Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Parrot Cichlid is a plant destroyer, which conflicts with Molly (Sailfin/Black/Dalmatian)'s requirement for live plants. Compromise where possible or prioritise the more critical need.

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

Molly (Sailfin/Black/Dalmatian) and Parrot Cichlid 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.