Can American Flagfish Live With Peppered Corydoras?
Yes, American flagfish and peppered corydoras coexist well in a 10-gallon tank with a stable temperature of 72F and pH of 6.5-7.5.
Why
- American flagfish are surface-dwelling killifish that grow to 2-3 inches and rarely venture to the bottom where corydoras spend their time.
- Peppered corydoras are bottom-dwelling catfish that stay on the substrate and in the lower levels, avoiding the flagfish entirely.
- Both species tolerate the same temperature of 72F and overlapping pH range of 6.5-7.5.
- A 10-gallon tank is sufficient because the two species occupy opposite zones and do not compete for space.
What could go wrong
American flagfish may nip at long-finned tankmates on occasion, though peppered corydoras are typically ignored due to their bottom-dwelling habits.
Gear for a shared tank
Sized for the 10 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.
AquaClear 20 Power Filter
Rated for up to 10 gallons with enough biological media to handle the waste from both species.
Eheim Jager 100W Thermostat Heater
Holds a steady temperature inside the 72-72°F window both species need.
API Freshwater Master Test Kit
Keep ammonia, nitrite, and nitrate in check. Two-species tanks have more bioload and less margin for error than single-species setups.
Related compatibility questions
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