Can Scat (Brackish) and Tire Track Eel Live Together?

🔴Not Recommended

Scat (Brackish) and Tire Track Eel 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

Scat (Brackish)

Scatophagus argus

Tire Track Eel

Mastacembelus armatus

🐟Family Group
Scat (Brackish)
Oddballs
Tire Track Eel
Oddballs
Temperament
Scat (Brackish)
Mostly Peaceful (4/10)
Tire Track Eel
Semi-Aggressive (6/10)
Temperature
✓ Compatible
Scat (Brackish)
20–28°C
Tire Track Eel
22–28°C
pH Range
✓ Compatible
Scat (Brackish)
7.5–8.5
Tire Track Eel
6.5–7.5
Hardness (dGH)
✓ Compatible
Scat (Brackish)
12–30
Tire Track Eel
5–15
Water Type
✗ No overlap
Scat (Brackish)
Brackish Required
Tire Track Eel
Freshwater Only
Flow Preference
✓ Compatible
Scat (Brackish)
High
Tire Track Eel
Moderate
Min Tank Volume
Combined: 816 L
Scat (Brackish)
450 L
Tire Track Eel
680 L
Swimming Level
Shared: 1 zone
Scat (Brackish)
MiddleBottom
Tire Track Eel
Bottom
🏷️Behavior Tags
Scat (Brackish)
Plant DestroyerHyperactive / Fast SwimmerAggressive Eater (Starves shy fish)Fin Nipper
Tire Track Eel
Piscivore (Eats small/nano fish)Shrimp EaterDigger (Disturbs Substrate)Jumper (Lid Required)NocturnalAggressive to same species/look-alikes

Behaviour & Temperament

Scat (Brackish) is a generally mild-mannered species (4/10), while Tire Track Eel is moderately assertive (6/10). This modest difference means Tire Track Eel may occasionally assert dominance over Scat (Brackish).

Scat (Brackish) and Tire Track Eel 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.

Worth noting: Tire Track Eel is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Tire Track Eel 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 12–15 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 Scat (Brackish) and Tire Track Eel together, plan for an aquarium of at least 816 litres with a minimum length of 180 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), Established Algae (Otocinclus), Driftwood (Digestion/Hiding). 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.

Frequently Asked Questions

Can Scat (Brackish) and Tire Track Eel live together?

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

What size tank do Scat (Brackish) and Tire Track Eel need?

A minimum of 816 litres (tank length at least 180 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 Scat (Brackish) and Tire Track Eel 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 Scat (Brackish) or Tire Track Eel aggressive?

Scat (Brackish) is generally mild-mannered (4/10) and Tire Track Eel is moderately assertive (6/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Scat (Brackish) and Tire Track Eel 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 Tire Track Eel's fins?

Scat (Brackish) is a known fin nipper. If Tire Track Eel 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 Tire Track Eel being nocturnal affect compatibility?

Tire Track Eel 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 Tire Track Eel during evening hours.


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