Can Arfak Rainbowfish and White Cloud Mountain Minnow Live Together?

Arfak Rainbowfish is a peaceful species (2/10), while White Cloud Mountain Minnow is peaceful (1/10). This modest difference means Arfak Rainbowfish may occasionally assert dominance over White Cloud Mountain Minnow.

Arfak Rainbowfish and White Cloud Mountain Minnow both frequent the Middle (Open Water) and Top (Surface) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

Worth noting: Arfak Rainbowfish is a known jumper, so a tight-fitting lid is essential.

There is no temperature overlap between Arfak Rainbowfish (24–28°C) and White Cloud Mountain Minnow (14–22°C). This fundamental mismatch makes long-term cohabitation impractical.

Both fish can tolerate a pH between 7 and 8. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 5–15 dGH. Regular testing will ensure conditions stay within this range.

To house Arfak Rainbowfish and White Cloud Mountain Minnow together, plan for an aquarium of at least 200 litres with a minimum length of 120 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 - lighly covered, Smooth Gravel (Sensitive Barbels), Plants - Densely covered. Meeting these requirements will help both species thrive.

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