Can Lorentz's Rainbowfish and Red Tupfel Shrimp Live Together?

Lorentz's Rainbowfish is a peaceful species (2/10), while Red Tupfel Shrimp is peaceful (0/10). This modest difference means Lorentz's Rainbowfish may occasionally assert dominance over Red Tupfel Shrimp.

Lorentz's Rainbowfish and Red Tupfel Shrimp 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.

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

There is no temperature overlap between Lorentz's Rainbowfish (26–30°C) and Red Tupfel Shrimp (18–25°C). This fundamental mismatch makes long-term cohabitation impractical.

Both fish can tolerate a pH between 7.2 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 8–10 dGH. Regular testing will ensure conditions stay within this range.

To house Lorentz's Rainbowfish and Red Tupfel Shrimp together, plan for an aquarium of at least 150 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: Plants - Densely covered, Plants - Floating, Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Established Algae (Otocinclus). Meeting these requirements will help both species thrive.

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

Lorentz's Rainbowfish and Red Tupfel Shrimp 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.