Neon Dwarf Rainbowfish

Melanotaenia praecox

A small, shimmering blue rainbowfish with red fins — perfect for planted community tanks.

Water

Freshwater

Temperature

73–82°F

pH

6.5–7.8

Hardness

5–15 dGH

Max size

2.4 in

Min tank

20 gal

Temperament

Peaceful

Social

Schooling (6+)

Swim level

All

Diet

Omnivore

Care level

Beginner

Lifespan

3-5 years

Breeding

Egg-scatterer

Suitability

Common

Origin

New Guinea (Mamberamo basin)

Neon dwarf rainbows stay small and glow electric blue under good light. A group brings out their active, peaceful schooling behavior.