Dwarf Neon Rainbowfish

Melanotaenia praecox

Dwarf Neon Rainbowfish is a peaceful middle swimmer.

PeacefulMiddle swimmerBeginner – Intermediate

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Need help with Dwarf Neon Rainbowfish?

Explore compatibility, care or problems using this guide and your aquarium’s conditions.

Quick facts

Adult size: ≤ 3.1" (≤ 8 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: 73–82°F (23–28°C)
pH: 6.8–7.5
GH: 5–15 dGH
Diet: Omnivore
Lifespan: up to 4 years

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 23–28 °C, pH 6.8–7.5, GH 5–15 dGH.

Temperament and compatibility

Dwarf Neon Rainbowfish is peaceful and suits calm community fish.

Swimming zone and behavior

This fish uses the middle part of the aquarium, so leave enough open swimming space for movement and feeding.

Feeding

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

Offer appropriately sized dry, live and frozen foods; keep enough open water and feeding access for active shoals.

Before adding this fish

Plan for an aquarium of 20 US gal (75 L) or larger / ≥ 31.5" (≥ 80 cm) minimum length.
Avoid aggressive or highly competitive fish.
Offer a varied diet suited to this species’ documented feeding habits.

Natural habitat and origin

Origin: Papua New Guinea Indonesia.

Important notes

Keep in an active social shoal with planted refuge and open swimming areas. A 54-L source minimum does not prove that every preferred larger shoal fits the same volume.

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 ≤ 4.3" (≤ 11 cm) 72–79°F (22–26°C) Banded Rainbowfish Melanotaenia trifasciata Same genus Same family Similar care level Beginner ≤ 5.9" (≤ 15 cm) 80–85°F (26.7–29.4°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) Ajamaru Rainbowfish Melanotaenia ajamaruensis Same genus Same family Similar care level Beginner – Intermediate ≤ 3.8" (≤ 9.7 cm) 81–86°F (27–30°C) Boesemans Rainbowfish Melanotaenia boesemani Same genus Same family Similar care level Beginner ≤ 4.3" (≤ 11 cm) 81–86°F (27–30°C) African Butterfly Cichlid Anomalochromis thomasi Similar care level Same temperament Bottom dweller Beginner – Intermediate ≤ 3.1" (≤ 8 cm) 73–81°F (23–27°C)

FAQ

How large does Dwarf Neon Rainbowfish get?

Dwarf Neon Rainbowfish reaches ≤ 3.1" (≤ 8 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 23 to 28 °C.