Can Betta Fish Live With Columbian Tetra?
No, columbian tetras are schooling fish that compete for mid-level space with bettas, and bettas will attack them as intruders.
Why
- Columbian tetras reach 2 inches and school in the mid-level, directly overlapping with a betta's territory.
- Bettas are solitary and territorial, viewing any school of fish in their zone as a threat to be driven out.
- Columbian tetras kept in groups of 6 or more present a persistent visual presence that aggravates the betta.
- The stress of constant chasing causes columbian tetras to lose color, stop schooling, and eventually decline in health.
What could go wrong
The betta will chase the columbian tetras relentlessly until they hide behind plants, at which point they stop eating and their health fails.
If you keep them in separate tanks
Sized for the 20 gallon minimum this pairing needs. Affiliate links — we earn a small commission if you buy through them.
AquaClear 30 Power Filter
Oversized filtration is what lets you stock two species together without water quality crashing. Rated for a tank slightly larger than the 20 gallon minimum.
Eheim Jager 150W 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
Columbian tetras do well in community tanks with barbs or other tetras. Bettas do well with peaceful bottom-dwellers like pygmy corydoras.
Related compatibility questions
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