Can Assassin Snail and Julii Corydoras (False Julii) Live Together?

🟢Ideal Tank Mates

Yes, Assassin Snail and Julii Corydoras (False Julii) are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. A minimum tank size of 72 litres is recommended.


At a Glance

Assassin Snail

Clea helena

Julii Corydoras (False Julii)

Corydoras trilineatus

🐠Family Group
Assassin Snail
Invertebrates
Julii Corydoras (False Julii)
Catfish
Temperament
Assassin Snail
Peaceful (2/10)
Julii Corydoras (False Julii)
Peaceful (0/10)
Temperature
✓ Compatible
Assassin Snail
22–28°C
Julii Corydoras (False Julii)
22–26°C
pH Range
✓ Compatible
Assassin Snail
7–8
Julii Corydoras (False Julii)
6–7.5
Hardness (dGH)
✓ Compatible
Assassin Snail
8–15
Julii Corydoras (False Julii)
2–15
Water Type
✓ Compatible
Assassin Snail
Freshwater Only
Julii Corydoras (False Julii)
Freshwater Only
Flow Preference
✓ Compatible
Assassin Snail
Low
Julii Corydoras (False Julii)
Moderate
Min Tank Volume
Combined: 72 L
Assassin Snail
10 L
Julii Corydoras (False Julii)
60 L
Swimming Level
Shared: 1 zone
Assassin Snail
Bottom
Julii Corydoras (False Julii)
Bottom
🏷️Behavior Tags
Assassin Snail
Nano / Bite-sized (Predation Risk)Snail EaterDigger (Disturbs Substrate)
Julii Corydoras (False Julii)
Hyperactive / Fast Swimmer

Behaviour & Temperament

Assassin Snail is a peaceful species (2/10), while Julii Corydoras (False Julii) is peaceful (0/10). This modest difference means Assassin Snail may occasionally assert dominance over Julii Corydoras (False Julii).

Assassin Snail and Julii Corydoras (False Julii) 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.

Water Parameters

The safe temperature window for both species falls between 22°C and 26°C. Aim for the midpoint of this range (around 24.0°C) for optimal comfort.

Both fish can tolerate a pH between 7 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 8–15 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.

Tank Setup

To house Assassin Snail and Julii Corydoras (False Julii) together, plan for an aquarium of at least 72 litres with a minimum length of 60 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). 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.

Find the right tank equipment

Browse tanks, décor, and equipment suited for this setup.

Frequently Asked Questions

Can Assassin Snail and Julii Corydoras (False Julii) live together?

Yes. Assassin Snail and Julii Corydoras (False Julii) are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.

What size tank do Assassin Snail and Julii Corydoras (False Julii) need?

A minimum of 72 litres (tank length at least 60 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 Assassin Snail and Julii Corydoras (False Julii) together?

Keep the aquarium between 22°C and 26°C. A target of around 24.0°C sits comfortably within both species' preferred ranges.

Are Assassin Snail or Julii Corydoras (False Julii) aggressive?

Assassin Snail is peaceful (2/10) and Julii Corydoras (False Julii) is peaceful (0/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Assassin Snail and Julii Corydoras (False Julii) need?

Both species overlap in the 7–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.


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