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Product Details


3cm - 5cm

Care Level




Water Conditions

Add vibrant beauty to your aquarium with Gertrudae Rainbowfish. Their dazzling colors and lively demeanor enhance any aquatic setting.


  • The Gertrudae Rainbowfish (Melanotaenia gertrudae) is a stunning freshwater fish species originating from Papua New Guinea.
  • Renowned for its vibrant colors and peaceful nature, the Gertrudae Rainbowfish is a popular choice among aquarists seeking to add beauty and vitality to their aquariums.

Water Conditions:

  • Temperature: Maintain water temperatures between 72°F to 78°F (22°C to 26°C) to ensure the health and well-being of Gertrudae Rainbowfish.
  • pH Levels: Ideally, the pH level should be kept between 6.5 to 7.5 to mimic their natural habitat.
  • Water Hardness: These fish thrive in moderately soft to moderately hard water conditions with a dGH range of 5 to 15.

Tank Mates:

  • Peaceful Community Fish: Gertrudae Rainbowfish are peaceful and social creatures, making them excellent tank mates for other non-aggressive species.
  • Suitable Tank Mates: Consider housing them with similarly sized fish such as tetras, rasboras, danios, gouramis, and other rainbowfish species.
  • Avoid Aggressive Species: Avoid pairing them with aggressive or fin-nipping fish that may harass or stress the Gertrudae Rainbowfish.

Feeding Habit:

  • Omnivorous Diet: Gertrudae Rainbowfish have an omnivorous diet and readily accept a variety of foods, including high-quality flakes, pellets, live, and frozen foods.
  • Supplement with Vegetables: Offer occasional servings of blanched vegetables like spinach or zucchini to provide essential fiber and nutrients.
  • Feed Regularly: Offer small, frequent meals throughout the day to meet their dietary needs and maintain their vibrant coloration.


  • Tank Size: Provide a spacious aquarium of at least 20 gallons to accommodate a small group of Gertrudae Rainbowfish comfortably.
  • Aquascaping: Create a natural environment with plenty of hiding spots, driftwood, rocks, and live plants to mimic their native habitat and provide enrichment.
  • Water Quality: Ensure excellent water quality through regular water changes and efficient filtration to prevent stress and disease.


  • Active Swimmers: Gertrudae Rainbowfish are active and agile swimmers, often seen darting around the tank in search of food and companionship.
  • Schooling Behavior: These fish exhibit schooling behavior and feel more secure when kept in groups of six or more individuals.


  • Egg Scatterers: Gertrudae Rainbowfish are egg scatterers, and spawning occurs amid dense vegetation or fine-leaved plants.
  • Separate Breeding Tank: Consider setting up a dedicated breeding tank with floating plants and plenty of hiding spots to encourage successful spawning.


  • Jumping: Gertrudae Rainbowfish are known to jump, so it's essential to cover the aquarium with a secure lid or mesh to prevent escape.
  • Disease Management: Practice proper quarantine procedures for new fish additions to minimize the risk of introducing diseases into the aquarium

Gertrudae RainbowFish

SGD 16.50

Out of Stock
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Suitable Tank Mates for Gertrudae RainbowFish