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Compatibility

Compatibility brief

Can Betta live with Columbian Tetra?

Betta

Betta

Betta splendens

semi-aggressive~7cm
Columbian Tetra

Columbian Tetra

Hyphessobrycon columbianus

peaceful~5cm
VerdictRISKY

Risky. This mix is commonly discouraged for typical setups.

Betta + Columbian Tetra: Known incompatible pairing. Columbian tetras are robust fin-nippers and will pursue the trailing fins of a betta until it stops moving. Not a working community pairing in any tank size. Real tanks add variables Fishori cannot model; treat this as a high-risk read, not certainty.

Compatibility score

30/100

Profile confidence: low

Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.

Min tank

80L

Combined minimum footprint reference for these two species: about 80L (larger active fish often want more length).

Temperature
Range in °C24–28°C shared
BettaColumbian TetraShared window
pH
Range6.5–7.5 shared
BettaColumbian TetraShared window
Temperament / behaviour

Columbian Tetra is a fin nipper and Betta is vulnerable to nipping — long fins are a common target even when water parameters match.

Assessment details

  1. Known incompatible pairing

    Top issue

    Columbian tetras are robust fin-nippers and will pursue the trailing fins of a betta until it stops moving. Not a working community pairing in any tank size.

  2. Temperament difference

    Betta is semi-aggressive, while Columbian Tetra is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely.

  3. Fin nipping risk

    Columbian Tetra is a known fin nipper and Betta has long, flowing fins. Columbian Tetra will likely harass Betta.

  4. Compatible temperature range

    Both fish can comfortably share similar water temperatures.

“Columbian tetras are robust fin-nippers and will pursue the…”

Known incompatible pairing

Next steps

Concrete changes, not "research more" filler.

  • •Provide plenty of hiding spots and visual breaks so Columbian Tetra can escape if harassed.
  • •Avoid keeping Columbian Tetra with long-finned fish like Betta.
  • •Columbian Tetra should be kept in a group of at least 8 for best health and behaviour.
Sources from both profiles
Only URLs that exist on the species records are shown. We do not fabricate citations.

Try this next

Build the full stocking list with Betta + Columbian Tetra

Compare another pairOpen tank builder

Plan further

Check each species’ mates list, size the glass, then verify the full stock in the builder. Methodology explains how verdicts are produced.

Individual fish vary in personality. Fishori uses conservative hobby rules. Observe any new introduction closely, feed thoughtfully, and keep a quarantine or backup plan. This is not veterinary advice.

Profile data confidence: medium. Driven by the lower-confidence profile (Columbian Tetra): Typical care sources — real tanks still vary.

Full tank-mate guides

Related pair checks

Betta + Columbian Tetra — common questions

Can Betta live with Columbian Tetra?
For most keepers, no. The verdict is RISKY: at least one check fails hard for a typical home tank. Choose a different pairing, or read the assessment details on this page to see exactly what fails before deciding.
What tank size do you need for Betta and Columbian Tetra together?
Plan around 80 litres as the working minimum. That figure comes from each species' published minimum and their group needs, and it assumes adult sizes, not shop sizes.
What's the main risk?
Known incompatible pairing. That is the check that fails outright for this pair. The matching entry under assessment details on this page explains the reasoning and the numbers behind it.
What should you check before buying?
Provide plenty of hiding spots and visual breaks so Columbian Tetra can escape if harassed. Avoid keeping Columbian Tetra with long-finned fish like Betta.