What size tank does a Red Tail Catfish need?

Red Tail Catfish needs a minimum of 125 gallons, with 188 gallons recommended. They are bottom swimmers.

Is Red Tail Catfish good for beginners?

Red Tail Catfish is rated "expert" difficulty (4/5). Best for experienced aquarists.

What fish are compatible with Red Tail Catfish?

Red Tail Catfish is aggressive. Compatible tank mates include other aggressive fish with similar water parameters (pH 6-7.5, temp 72-82°F). Give adequate territory space.

Red Tail Catfish

Phractocephalus hemioliopterus

Family: Pimelodidae • Origin: Various

Red Tail Catfish (Phractocephalus hemioliopterus) is a aggressive catfish reaching 48 inches. Can be kept singly. Minimum tank: 125 gallons.

Min Tank

125 gal

Max Size

48"

Temperature

72-82°F

6-7.5

Lifespan

20 years

School Size

Solo OK

Swim Level

bottom

Hardness

5-15 dGH

aggressiveexpertcarnivore

Is Red Tail Catfish Right for Your Tank?

Red Tail Catfish is rated "expert" (4/5) — best for experienced aquarists. They have specific requirements that make them challenging for beginners. At 125+ gallons minimum, these are large-tank fish. Make sure you have the space and filtration before committing.

Red Tail Catfish 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: 20 years with proper care.

Common Mistakes with Red Tail Catfish

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Relying on a heater without a thermometer

Red Tail Catfish 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 125 gallons

Many beginners underestimate tank size needs. Red Tail Catfish requires at least 125 gallons — ideally 188. Cramped tanks lead to stunted growth, aggression, and poor water quality.

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Housing with peaceful nano fish

Red Tail Catfish 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.