Fish care
Neon Tetra: Complete Care Guide
Last updated: May 2026
Structured care sheet for Neon tetra (Paracheirodon innesi). Validate every purchase with the free aquarium stocking calculator, parameter testing habits, and the species database table.
- Cross-check length and temperature against the species explorer.
- Track nitrate drift weekly once the tank has cycled.
- Refer to the species hub for long-form tank mate essays.
Schooling and tank design
Neon tetras are not decoration fish in trios. Treat them as a single biological unit and plan for at least a dozen adults in well-established water. Long tanks beat tall columns because they use horizontal swimming lanes; heavy flow at the glass often exhausts them, so aim for gentle turnover and plenty of mid-water plant cover or hardscape breaks.
Health signals
Fading colour, clamped fins, or white clouds on the body often mean stress or opportunistic pathogens rather than “bad luck.” Quarantine new purchases, match temperature when acclimating, and avoid chasing pH with acids unless you understand KH buffers. If fish sit near the surface gasping while parameters look fine, check dissolved oxygen after feeding and on hot days.
See tank mate combinations tuned to temperament overlap.
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