Can Betta Fish Live With Congo Tetra?
No, congo tetras stress bettas with constant movement and require a larger group than a betta tank can accommodate.
Why
- Congo tetras grow to 3-4 inches and are active swimmers that dart across all tank levels.
- They need groups of 6 or more to feel secure, which means constant activity a betta interprets as threats.
- A 40-gallon minimum for a proper congo tetra school exceeds what most betta keepers set up.
- Bettas hold territory and react to fast-moving fish as if they are rivals or predators.
What could go wrong
The betta flares constantly, depletes its immune system, and either attacks the tetras or succumbs to stress disease.
If you keep them in separate tanks
Sized for the 30 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.
AquaClear 70 Power Filter
Oversized filtration is what lets you stock two species together without water quality crashing. Rated for a tank slightly larger than the 30 gallon minimum.
Eheim Jager 200W Thermostat Heater
Holds a steady temperature inside the 76-82°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.
Better pairings to consider
Bettas do well with ember tetras or lambchop rasboras. Congo tetras do well in a species tank or with larger dithers like rainbowfish.
Related compatibility questions
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