Can Cardinal Shrimp (Sulawesi) and Scissortail Rasbora Live Together?

Cardinal Shrimp (Sulawesi) is a peaceful species (0/10), while Scissortail Rasbora is peaceful (1/10). This modest difference means Scissortail Rasbora may occasionally assert dominance over Cardinal Shrimp (Sulawesi).

In terms of spatial distribution, Cardinal Shrimp (Sulawesi) prefers the Bottom (Substrate) zone, whereas Scissortail Rasbora occupies the Top (Surface) and Middle (Open Water) zones. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.

Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion. Aggressive eaters may outcompete shy fish for food, leading to malnutrition.

Worth noting: Scissortail Rasbora is a known jumper, so a tight-fitting lid is essential.

To improve the chances of a peaceful coexistence in this community tank: A larger aquarium with ample hiding spots can help diffuse aggression and give the less dominant fish space to retreat.

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.

Both fish can tolerate a pH between 7.5 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 4–8 dGH. Regular testing will ensure conditions stay within this range.

To house Cardinal Shrimp (Sulawesi) and Scissortail Rasbora together, plan for an aquarium of at least 150 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.

Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.

Specific environmental needs for this combination include: Established Algae (Otocinclus), Smooth Gravel (Sensitive Barbels), Sand (Sifters). 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.

This pairing usually fails when the tank is treated like a standard mixed community and the caution flags are ignored. Cardinal Shrimp (Sulawesi) and Scissortail Rasbora need extra room, more cover, and closer observation during the first few weeks so small aggression, feeding, or territory issues do not snowball into a long-term problem.

Feeding time deserves special attention with this pairing. Scissortail Rasbora is an aggressive eater that may prevent Cardinal Shrimp (Sulawesi) from getting enough food.

Because Scissortail Rasbora is a fast, competitive feeder, consider using sinking pellets or feeding at opposite ends of the setup to ensure Cardinal Shrimp (Sulawesi) receives an adequate share.