Skip to main content
Compatibility

Compatibility brief

Can Betta live with Neon Tetra?

Betta

Betta

Betta splendens

semi-aggressive~7cm
Neon Tetra

Neon Tetra

Paracheirodon innesi

peaceful~4cm
VerdictCAUTION

Caution. Check the issues below before buying.

Betta + Neon Tetra: Temperament difference. Betta is semi-aggressive, while Neon Tetra is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely. Outcomes still depend on your tank shape, maintenance routine, and individual fish.

Compatibility score

70/100

Profile confidence: medium

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

Min tank

40L

Combined minimum footprint reference for these two species: about 40L (larger active fish often want more length).

Temperature
Range in °C24–26°C shared
BettaNeon TetraShared window
pH
Range6.5–7 shared
BettaNeon TetraShared window
Temperament / behaviour

Temperament gap (semi-aggressive vs peaceful) — needs space, structure, and careful observation, not a “drop and forget” mix.

Assessment details

  1. Temperament difference

    Top issue

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

  2. Narrow temperature overlap

    Betta and Neon Tetra have only a narrow shared temperature range. Maintaining stable water temperature will be important.

“Betta is semi-aggressive, while Neon Tetra is peaceful”

Temperament difference

Next steps

Concrete changes, not "research more" filler.

  • •Provide plenty of hiding spots and visual breaks so Neon Tetra can escape if harassed.
  • •Neon Tetra should be kept in a group of at least 6 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 + Neon 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: high. Checked against several solid care sources that mostly agree.

Full tank-mate guides

Related pair checks

Betta + Neon Tetra — common questions

Can Betta live with Neon Tetra?
Yes, if you plan for it. The verdict is CAUTION, which means the pairing works when specific conditions are met, not by default. The first condition: Provide plenty of hiding spots and visual breaks so Neon Tetra can escape if harassed.
What tank size do you need for Betta and Neon Tetra together?
Plan around 40 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?
Temperament difference. That is the first thing to plan around. The matching entry under assessment details on this page explains the reasoning and the numbers behind it.
What should you check before buying?
Neon Tetra should be kept in a group of at least 6 for best health and behaviour.