What size tank does a Geophagus Brasiliensis need?

Geophagus Brasiliensis needs a minimum of 75 gallons, with 113 gallons recommended. They are bottom swimmers.

Is Geophagus Brasiliensis good for beginners?

Geophagus Brasiliensis is rated "intermediate" difficulty (2/5). Great for beginners.

What fish are compatible with Geophagus Brasiliensis?

Geophagus Brasiliensis is semi-aggressive. Compatible tank mates include other semi-aggressive fish with similar water parameters (pH 6.5-7.5, temp 72-82°F). Give adequate territory space.

Geophagus Brasiliensis

Geophagus brasiliensis

Family: Cichlidae • Origin: Various

Geophagus Brasiliensis (Geophagus brasiliensis) is a semi-aggressive cichlid reaching 10 inches. Can be kept singly. Minimum tank: 75 gallons.

Min Tank

75 gal

Max Size

10"

Temperature

72-82°F

6.5-7.5

Lifespan

15 years

School Size

Solo OK

Swim Level

bottom

Hardness

5-15 dGH

semi-aggressiveintermediateomnivore

Is Geophagus Brasiliensis Right for Your Tank?

Geophagus Brasiliensis is an excellent choice for beginners — rated "intermediate" difficulty (2/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. They need at least 75 gallons — a mid-size tank commitment. Plan your space accordingly.

Geophagus Brasiliensis is semi-aggressive — they can live with others but may bully smaller or slower fish. Choose tank mates carefully. They are territorial — provide adequate hiding spots and maintain enough space to reduce aggression. Expected lifespan: 15 years with proper care.

Common Mistakes with Geophagus Brasiliensis

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Relying on a heater without a thermometer

Geophagus Brasiliensis 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. Geophagus Brasiliensis 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

Geophagus Brasiliensis is semi-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.