Can Betta Fish Live With Buenos Aires Tetra?
No, buenos aires tetras are aggressive fin nippers and too active for bettas, and they grow too large for most betta tanks.
Why
- Buenos Aires tetras reach 2.5-3 inches and need a minimum of 30 gallons due to their speed and activity level.
- This species is a documented fin nipper, targeting long-finned fish including bettas, guppies, and angelfish.
- Buenos Aires tetras are schooling fish that need groups of 6 or more, which creates constant activity in the mid-level.
- The betta will either be nipped relentlessly or will be chased into a corner by the school, with no safe space.
What could go wrong
The school of Buenos Aires tetras will tear the betta's fins during the first week, and the betta will have nowhere to escape in most tanks.
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
Buenos Aires tetras do well with larger peaceful community fish like silver dollars or tiger barbs. Bettas do well alone or with bottom-dwelling species.
Related compatibility questions
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