Dwarf Neon Rainbowfish

Melanotaenia praecox

Dwarf Neon Rainbowfish is a peaceful middle swimmer. Keep in a school of 5+.

PeacefulMiddle swimmerKeep in a school of 5+Beginner – Intermediate

Save this fish or add it directly to one of your aquariums.

Quick facts

Adult size: ≤ 2.4" (≤ 6 cm)
Aquarium size: 20 US gal (75 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length
Care level: Beginner – Intermediate
Temperament: Peaceful
Swimming zone: Middle swimmer
Temperature: 72–79°F (22–26°C)
pH: 6.5–7.5
GH: 5–15 dGH
Diet: Omnivore
Lifespan: up to 4 years
Group behavior: Keep in a school of 5+

Care requirements

Care level: Beginner – Intermediate.

Lifespan: up to 4 years.

Aquarium size and space needs

Minimum aquarium size: 20 US gal (75 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length. Plan the layout and stocking within that limit.

Water parameters

Suitable water: temperature 22–26 °C, pH 6.5–7.5, GH 5–15 dGH.

Temperament and compatibility

Dwarf Neon Rainbowfish is peaceful and suits calm community fish.

Keep in a school of 5+.

Swimming zone and behavior

This fish uses the middle part of the aquarium, so leave enough open swimming space for movement and feeding. Keep in a school of 5+.

Feeding

As an omnivore, Dwarf Neon Rainbowfish should receive a varied diet rather than one repeated food type.

Before adding this fish

Plan for an aquarium of 20 US gal (75 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length.
Make room for its social group.
Avoid aggressive or highly competitive fish.
Keep in a school of 5+.
Offer a varied diet that matches this species.

Natural habitat and origin

Origin: Papua New Guinea Indonesia.

Similar fish profiles

Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.

Aru Rainbowfish Melanotaenia picta Same genus Same family Similar care level Beginner – Intermediate ≤ 3.5" (≤ 9 cm) 72–81°F (22–27°C) Black Banded Rainbowfish Melanotaenia nigrans Same genus Same family Similar care level Beginner – Intermediate ≤ 3.9" (≤ 10 cm) 73–82°F (23–28°C) Banded Rainbowfish Melanotaenia trifasciata Same genus Same family Similar care level Beginner ≤ 5.1" (≤ 13 cm) 70–79°F (21–26°C) Boesemans Rainbowfish Melanotaenia boesemani Same genus Same family Similar care level Beginner ≤ 5.1" (≤ 13 cm) 79–86°F (26–30°C) Ajamaru Rainbowfish Melanotaenia ajamaruensis Same genus Same family Similar care level Beginner – Intermediate ≤ 3.9" (≤ 10 cm) 81–86°F (27–30°C) African Banded Barb Barbus fasciolatus Similar care level Same temperament Same swimming zone Beginner – Intermediate ≤ 2.4" (≤ 6 cm) 70–79°F (21–26°C)

FAQ

How large does Dwarf Neon Rainbowfish get?

Dwarf Neon Rainbowfish reaches ≤ 2.4" (≤ 6 cm).

What aquarium size does Dwarf Neon Rainbowfish need?

Use an aquarium of at least 20 US gal (75 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length.

Is Dwarf Neon Rainbowfish peaceful?

Yes. Dwarf Neon Rainbowfish is recorded as peaceful and is best planned with calm community fish that do not harass it or dominate the feeding area.

What temperature is suitable for Dwarf Neon Rainbowfish?

Keep it between 22 to 26 °C.

Should Dwarf Neon Rainbowfish be kept alone or in a group?

Dwarf Neon Rainbowfish: Keep in a school of 5+.