What size tank does a Green Terror need?

Green Terror needs a minimum of 75 gallons, with 113 gallons recommended. They are middle swimmers.

Is Green Terror good for beginners?

Green Terror is rated "advanced" difficulty (3/5). Suitable for intermediate fishkeepers.

What fish are compatible with Green Terror?

Green Terror is aggressive. Compatible tank mates include other aggressive fish with similar water parameters (pH 6.5-8, temp 72-82°F). Give adequate territory space.

Green Terror

Andinoacara rivulatus

Family: Cichlidae • Origin: Various

Green Terror (Andinoacara rivulatus) is a aggressive cichlid reaching 12 inches. Can be kept singly. Minimum tank size: 75 gallons.

Min Tank

75 gal

Max Size

12"

Temperature

72-82°F

6.5-8

Lifespan

15 years

School Size

Solo OK

Swim Level

middle

Hardness

5-15 dGH

aggressiveadvancedcarnivore

Is Green Terror Right for Your Tank?

Green Terror is a moderate-care fish rated "advanced" (3/5). Suitable for hobbyists with some experience who can maintain stable water parameters. They need at least 75 gallons — a mid-size tank commitment. Plan your space accordingly.

Green Terror is aggressive and best kept alone or with other robust species that can hold their own. Not suitable for peaceful community tanks. They are territorial — provide adequate hiding spots and maintain enough space to reduce aggression. Expected lifespan: 15 years with proper care.

Common Mistakes with Green Terror

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Relying on a heater without a thermometer

Green Terror 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 75 gallons

Many beginners underestimate tank size needs. Green Terror requires at least 75 gallons — ideally 113. Cramped tanks lead to stunted growth, aggression, and poor water quality.

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Housing with peaceful nano fish

Green Terror is aggressive and territorial — small, peaceful species like neon tetras, endlers, or celestial pearl danios will be stressed, bullied, or eaten. Choose tank mates that can hold their own.