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[ARRIVED 28-MAR-2026] Black Mollies 3-5cm

Description

Black Molly (Poecilia sp.)

Hardy livebearer with bold black colouration, peaceful temperament, and strong community aquarium compatibility

Quick Facts

  • Scientific Group: Poecilia species
  • Adult Size: Approx. 6–10 cm
  • Tank Size: 60L+ recommended
  • Difficulty: 🟒 Easy
  • Temperament: Peaceful livebearer
  • Diet: Omnivore

Is this for you?

βœ”οΈ Good if:

  • You want a hardy beginner-friendly fish
  • You enjoy active community aquariums
  • You prefer livebearers
  • You keep moderate to hard water conditions

❌ Avoid if:

  • You keep highly aggressive fish
  • You run very soft acidic water only
  • You want a tiny nano species
  • You dislike livebearer breeding behaviour

Why this fish?

Black Mollies are a popular aquarium livebearer known for their solid dark colouration, active swimming behaviour, and adaptability.

They are often chosen by beginners because of their hardiness and ability to thrive in a range of freshwater conditions.

Their peaceful nature allows them to integrate well into community aquariums while still providing movement and personality.

Common mistakes

  • Keeping in unstable or soft acidic water
  • Overcrowding due to breeding
  • Providing insufficient vegetable matter
  • Mixing with aggressive tank mates
  • Underestimating adult size

Care made simple

  • Temperature: 24–28Β°C
  • pH: 7.0–8.2
  • Water Hardness: Moderate to hard preferred
  • Diet: Flakes, pellets, algae, vegetables, frozen foods
  • Swimming Zone: Mid-water

Feeding

  • Quality flakes or pellets
  • Vegetable matter and algae-based foods
  • Frozen foods as enrichment
  • Feed small portions 1–2 times daily

Pair with

  • Peaceful tetras and rasboras
  • Corydoras catfish
  • Platies and guppies
  • Snails and hardy shrimp
  • Planted community aquariums

Important Notes

  • Mollies are adaptable but prefer stable, mineral-rich water
  • Livebearers may reproduce frequently
  • Females are typically larger than males
  • Colour intensity can vary slightly between individuals
  • Good water quality helps maintain strong colouration
NTA Insight:
Mollies often do poorly in very soft water despite being considered hardy. Stable mineral content and moderate hardness usually produce healthier, more active fish.

FAQ

Are Black Mollies beginner-friendly?

Yes. They are hardy and adaptable when kept in stable water conditions.

Can they live with shrimp?

Adult shrimp may coexist, though small shrimplets could occasionally be eaten.

Do Black Mollies breed easily?

Yes. They are livebearers and may reproduce regularly in community tanks.

Do they need hard water?

They generally perform best in moderate to hard water conditions.

Are they peaceful?

Yes. They are considered peaceful community fish.

[ARRIVED 28-MAR-2026] Black Mollies 3-5cm

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11 in stock

$8.00


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    Description

    Black Molly (Poecilia sp.)

    Hardy livebearer with bold black colouration, peaceful temperament, and strong community aquarium compatibility

    Quick Facts

    • Scientific Group: Poecilia species
    • Adult Size: Approx. 6–10 cm
    • Tank Size: 60L+ recommended
    • Difficulty: 🟒 Easy
    • Temperament: Peaceful livebearer
    • Diet: Omnivore

    Is this for you?

    βœ”οΈ Good if:

    • You want a hardy beginner-friendly fish
    • You enjoy active community aquariums
    • You prefer livebearers
    • You keep moderate to hard water conditions

    ❌ Avoid if:

    • You keep highly aggressive fish
    • You run very soft acidic water only
    • You want a tiny nano species
    • You dislike livebearer breeding behaviour

    Why this fish?

    Black Mollies are a popular aquarium livebearer known for their solid dark colouration, active swimming behaviour, and adaptability.

    They are often chosen by beginners because of their hardiness and ability to thrive in a range of freshwater conditions.

    Their peaceful nature allows them to integrate well into community aquariums while still providing movement and personality.

    Common mistakes

    • Keeping in unstable or soft acidic water
    • Overcrowding due to breeding
    • Providing insufficient vegetable matter
    • Mixing with aggressive tank mates
    • Underestimating adult size

    Care made simple

    • Temperature: 24–28Β°C
    • pH: 7.0–8.2
    • Water Hardness: Moderate to hard preferred
    • Diet: Flakes, pellets, algae, vegetables, frozen foods
    • Swimming Zone: Mid-water

    Feeding

    • Quality flakes or pellets
    • Vegetable matter and algae-based foods
    • Frozen foods as enrichment
    • Feed small portions 1–2 times daily

    Pair with

    • Peaceful tetras and rasboras
    • Corydoras catfish
    • Platies and guppies
    • Snails and hardy shrimp
    • Planted community aquariums

    Important Notes

    • Mollies are adaptable but prefer stable, mineral-rich water
    • Livebearers may reproduce frequently
    • Females are typically larger than males
    • Colour intensity can vary slightly between individuals
    • Good water quality helps maintain strong colouration
    NTA Insight:
    Mollies often do poorly in very soft water despite being considered hardy. Stable mineral content and moderate hardness usually produce healthier, more active fish.

    FAQ

    Are Black Mollies beginner-friendly?

    Yes. They are hardy and adaptable when kept in stable water conditions.

    Can they live with shrimp?

    Adult shrimp may coexist, though small shrimplets could occasionally be eaten.

    Do Black Mollies breed easily?

    Yes. They are livebearers and may reproduce regularly in community tanks.

    Do they need hard water?

    They generally perform best in moderate to hard water conditions.

    Are they peaceful?

    Yes. They are considered peaceful community fish.

    Live Arrival & Ordering FAQ

    Do you offer a live arrival guarantee?

    Yes. All livestock is covered by our Live Arrival Guarantee.

    In the rare event of DOA, please contact us promptly with clear photos of the livestock in the original unopened bag.

    Please review our full DOA and store policies before purchase.

    Can you ship to all states in Australia?

    No. Due to state restrictions, we cannot ship livestock or live plants to WA and TAS.

    What should I check before ordering?

    Before placing an order, make sure:

    • Your tank is fully cycled and stable
    • Your aquarium has enough space for the species
    • Your current livestock are compatible in temperament, size, and requirements
    • Your water parameters, habitat, and temperature suit the species
    • You are not adding too many fish at once
    What should I expect when my fish arrives?

    It is normal for fish, shrimp, or snails to look pale, stressed, or less active after shipping.

    This is temporary. Most livestock will settle and regain colour within a few days.

    How long does it take for fish to settle in?

    Most livestock will take 3–7 days to fully adjust to their new environment.

    Should I feed my fish immediately after arrival?

    No. We recommend waiting 24 hours before feeding to allow them to settle.

    If you already have fish in your tank, feeding them before introducing new arrivals can help reduce stress.

    Why do fish sometimes struggle after being added to a tank?

    In most cases, issues are caused by tank conditions, not shipping.

    • Uncycled or unstable tanks
    • Poor water parameters
    • Overstocking
    • Unsuitable tank mates
    What is Nano Tanks Australia’s main tip for new livestock?

    Most livestock losses happen in immature or unstable tanks, not during shipping.

    If your setup is not fully established, the risk to new arrivals is significantly higher.

    Not sure if this fish is right for your setup?

    If you are unsure whether this species suits your setup, contact us before ordering and we’ll help point you in the right direction.

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