What size tank does a Glass Catfish need?

Glass Catfish needs a minimum of 20 gallons, with 30 gallons recommended. They are middle swimmers. Keep in groups of 5+.

Is Glass Catfish good for beginners?

Glass Catfish is rated "intermediate" difficulty (3/5). Suitable for intermediate fishkeepers.

What fish are compatible with Glass Catfish?

Glass Catfish is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6.5-7.5, temp 75-82°F).

Glass Catfish

Kryptopterus vitreolus

Family: Siluridae • Origin: Southeast Asia

Glass Catfish are completely transparent — you can see their organs and skeleton. A fascinating conversation piece in planted tanks.

Min Tank

20 gal

Max Size

Temperature

75-82°F

6.5-7.5

Lifespan

5 years

School Size

Swim Level

middle

Hardness

5-12 dGH

peacefulintermediateomnivoreschooling

Is Glass Catfish Right for Your Tank?

Glass Catfish is a moderate-care fish rated "intermediate" (3/5). Suitable for hobbyists with some experience who can maintain stable water parameters. A 20-gallon tank minimum is standard — most community setups will accommodate them.

With a peaceful temperament, Glass Catfish makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 5 together, or they may become stressed and display abnormal behavior. Expected lifespan: 5 years with proper care.

Common Mistakes with Glass Catfish

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Keeping fewer than 5 together

Glass Catfish is a schooling species — they need a group of at least 5 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Relying on a heater without a thermometer

Glass Catfish needs 75–82°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 20 gallons

Many beginners underestimate tank size needs. Glass Catfish requires at least 20 gallons — ideally 30. Cramped tanks lead to stunted growth, aggression, and poor water quality.