What size tank does a Assassin Snail need?

Assassin Snail needs a minimum of 10 gallons, with 15 gallons recommended. They are bottom swimmers.

Is Assassin Snail good for beginners?

Assassin Snail is rated "beginner" difficulty (1/5). Great for beginners.

What fish are compatible with Assassin Snail?

Assassin Snail is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6.5-7.5, temp 72-82°F).

Assassin Snail

Clea helena

Family: Buccinidae • Origin: Various

Assassin Snail (Clea helena) is a peaceful snail reaching 3 inches. Can be kept singly. Minimum tank size: 10 gallons.

Min Tank

10 gal

Max Size

Temperature

72-82°F

6.5-7.5

Lifespan

5 years

School Size

Solo OK

Swim Level

bottom

Hardness

5-15 dGH

peacefulbeginnercarnivore

Is Assassin Snail Right for Your Tank?

Assassin Snail is an excellent choice for beginners — rated "beginner" difficulty (1/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. At just 10 gallons minimum, they work well in nano tanks and smaller setups.

With a peaceful temperament, Assassin Snail makes a great community fish. They coexist well with other non-aggressive species of similar size. Expected lifespan: 5 years with proper care.

Common Mistakes with Assassin Snail

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Relying on a heater without a thermometer

Assassin Snail needs 72–82°F. Heaters malfunction or drift over time — always use a separate thermometer to verify. Temperature swings of even 3–4°F can trigger stress and disease, particularly ich.

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Putting them in a tank under 10 gallons

While 10 gallons is the minimum, nano tanks require more frequent water changes and leave less room for error. A slightly larger tank (15 gal) is much more forgiving.

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Skipping the quarantine period

Even healthy-looking fish can carry parasites or disease. Quarantine new Assassin Snail for 2–4 weeks in a separate tank before adding to your main aquarium.