Can Arrowhead Puffer and Fairy Cichlid (Brichardi) Live Together?

Arrowhead Puffer is a highly aggressive species (10/10), while Fairy Cichlid (Brichardi) is semi-aggressive (8/10). This modest difference means Arrowhead Puffer may occasionally assert dominance over Fairy Cichlid (Brichardi).

Both Arrowhead Puffer and Fairy Cichlid (Brichardi) are highly aggressive, increasing the risk of violent confrontations.

Arrowhead Puffer and Fairy Cichlid (Brichardi) 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.

Additional behavioural considerations to keep in mind: Aggressive fish may bully and stress shy, slow-moving species. Two aggressive species housed together increases risk of fighting.

The safe temperature window for both species falls between 23°C and 27°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.

The pH requirements of Arrowhead Puffer (6.5–7.5) and Fairy Cichlid (Brichardi) (8–9) do not overlap, making it impossible to satisfy both species simultaneously.

For general hardness, the shared comfort zone is 10–15 dGH. Regular testing will ensure conditions stay within this range.

To house Arrowhead Puffer and Fairy Cichlid (Brichardi) together, plan for an aquarium of at least 114 litres with a minimum length of 75 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), Smooth Gravel (Sensitive Barbels). 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.