Can Reedfish (Ropefish) and Scat (Brackish) Live Together?

🔴Not Recommended

Reedfish (Ropefish) and Scat (Brackish) are not recommended as tank mates due to incompatible water types. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.


At a Glance

Reedfish (Ropefish)

Erpetoichthys calabaricus

Scat (Brackish)

Scatophagus argus

🐟Family Group
Reedfish (Ropefish)
Oddballs
Scat (Brackish)
Oddballs
Temperament
Reedfish (Ropefish)
Mostly Peaceful (3/10)
Scat (Brackish)
Mostly Peaceful (4/10)
Temperature
✓ Compatible
Reedfish (Ropefish)
22–28°C
Scat (Brackish)
20–28°C
pH Range
✓ Compatible
Reedfish (Ropefish)
6–7.5
Scat (Brackish)
7.5–8.5
Hardness (dGH)
✓ Compatible
Reedfish (Ropefish)
5–20
Scat (Brackish)
12–30
Water Type
✗ No overlap
Reedfish (Ropefish)
Freshwater Only
Scat (Brackish)
Brackish Required
Flow Preference
✗ No overlap
Reedfish (Ropefish)
Low
Scat (Brackish)
High
Min Tank Volume
Combined: 540 L
Reedfish (Ropefish)
180 L
Scat (Brackish)
450 L
Swimming Level
Shared: 2 zones
Reedfish (Ropefish)
BottomMiddle
Scat (Brackish)
MiddleBottom
🏷️Behavior Tags
Reedfish (Ropefish)
Piscivore (Eats small/nano fish)Shrimp EaterJumper (Lid Required)NocturnalHyperactive / Fast SwimmerSlime Coat Eater (Attacks Flat Fish)
Scat (Brackish)
Plant DestroyerHyperactive / Fast SwimmerAggressive Eater (Starves shy fish)Fin Nipper

Behaviour & Temperament

Reedfish (Ropefish) is a generally mild-mannered species (3/10), while Scat (Brackish) is generally mild-mannered (4/10). This modest difference means Scat (Brackish) may occasionally assert dominance over Reedfish (Ropefish).

Reedfish (Ropefish) and Scat (Brackish) both frequent the Bottom (Substrate) and 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: Reedfish (Ropefish) is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Reedfish (Ropefish) is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 22°C and 28°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.

Both fish can tolerate a pH between 7.5 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 12–20 dGH. Regular testing will ensure conditions stay within this range.

Crucially, these species require different water types — one needs freshwater while the other requires brackish conditions. This is a hard barrier to keeping them together.

Tank Setup

To house Reedfish (Ropefish) and Scat (Brackish) together, plan for an aquarium of at least 540 litres with a minimum length of 150 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

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), Driftwood (Digestion/Hiding), Plants - Densely covered, Established Algae (Otocinclus). Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Scat (Brackish) is a plant destroyer, which conflicts with Reedfish (Ropefish)'s requirement for live plants. Compromise where possible or prioritise the more critical need.

Reedfish (Ropefish) prefers Low (Still Water) flow while Scat (Brackish) needs High (River/Stream) flow. Consider positioning filter outlets and using baffles to create zones of different current intensity within the same tank.

Frequently Asked Questions

Can Reedfish (Ropefish) and Scat (Brackish) live together?

No. This combination is not recommended. Key incompatibilities — such as different water type needs — make cohabitation unsafe.

What size tank do Reedfish (Ropefish) and Scat (Brackish) need?

A minimum of 540 litres (tank length at least 150 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.

What water temperature is best for Reedfish (Ropefish) and Scat (Brackish) together?

Keep the aquarium between 22°C and 28°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.

Are Reedfish (Ropefish) or Scat (Brackish) aggressive?

Reedfish (Ropefish) is generally mild-mannered (3/10) and Scat (Brackish) is generally mild-mannered (4/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Reedfish (Ropefish) and Scat (Brackish) need?

Both species overlap in the 7.5–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

Will Scat (Brackish) nip Reedfish (Ropefish)'s fins?

Scat (Brackish) is a known fin nipper. If Reedfish (Ropefish) has long or flowing fins, there is a real risk of fin damage. Keeping Scat (Brackish) in a larger group can help redirect nipping behaviour toward conspecifics.

Does Reedfish (Ropefish) being nocturnal affect compatibility?

Reedfish (Ropefish) is most active after lights-out, which naturally reduces daytime encounters with its tank mate. This can actually be beneficial, as both fish get undisturbed time to feed and explore. Just ensure food reaches Reedfish (Ropefish) during evening hours.


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