Neon Dwarf Rainbowfish

Neon Dwarf Rainbowfish

Melanotaenia praecox

Also known as: Praecox Rainbow

💧 Freshwater ✌️ Peaceful 🟢 Easy 🍽️ Omnivore Schooling (6+)

Iridescent neon-blue body with vivid red or yellow fins. Small enough for most community tanks.

Tank Size

20 gal
minimum (30+ preferred)

Temperature

73–82°F
23–28°C

pH Range

6.5–7.5
water acidity

Max Size

3"
7.6 cm

Lifespan

4–5 years
typical in captivity

Swim Level

Middle
preferred zone

Care Notes

Active and peaceful. Great for planted community tanks. Colors best in groups.

Feeding

Flakes, pellets, and frozen foods.

Compatible Tank Mates

Neon Tetra 1.5" Cardinal Tetra 2" Rummy Nose Tetra 2" Congo Tetra 3.5" Glowlight Tetra 1.5" Harlequin Rasbora 2" Celestial Pearl Danio 1" Zebra Danio 2" Bloodfin Tetra 2" Lemon Tetra 1.5" Black Neon Tetra 1.5" Diamond Tetra 2.5"

Use Caution With

Ember Tetra 0.8" Black Skirt Tetra 2.5" Serpae Tetra 1.75" Chili Rasbora 0.7" Buenos Aires Tetra 3" Green Neon Tetra 1" Silvertip Tetra 2" Phoenix Rasbora 0.8" Exclamation Point Rasbora 0.7" Colombian Tetra 2.5" Giant Danio 4" Kubotai Rasbora 0.8"

Incompatible With

White Cloud Mountain Minnow 1.5" Oscar 14" Jack Dempsey 10" Convict Cichlid 5" Green Terror 8" Texas Cichlid 12" Pike Cichlid 10" Salvini Cichlid 8" Red Devil 12" Jaguar Cichlid 16" Flowerhorn 12" Midas Cichlid 12"

Check Compatibility

Want to check if Neon Dwarf Rainbowfish is compatible with a specific fish? Use our compatibility checker to build your complete tank.