The Blue Rainbowfish (Melanotaenia lacustris), also known as the Lake Kutubu Rainbowfish, is a captivating freshwater species cherished by aquarium enthusiasts for its striking colors and peaceful demeanor. With its shimmering blue hues and sociable nature, the Blue Rainbowfish adds a touch of elegance and activity to any aquarium. Let's explore the prominent features, care requirements, and essential considerations for keeping Blue Rainbowfish in your tank:

Appearance:

• Iridescent Blue: The Blue Rainbowfish features iridescent shades of blue that shimmer under aquarium lighting, making it a standout species.
• Sexual Dimorphism: Males often exhibit more vibrant colors and elongated dorsal fins compared to females.

Behavior:

• Peaceful Shoalers: Blue Rainbowfish are shoaling fish, meaning they thrive when kept in groups of their own kind. A group of at least six is recommended.
• Active Swimmers: They are active and lively swimmers, creating a dynamic and engaging presence in the tank.

Tank Setup:

• Tank Size: Provide a tank of at least 30 gallons (113 liters) to allow ample space for their swimming and shoaling behaviors.
• Aquascape: Incorporate live plants, rocks, and driftwood to provide hiding spots and replicate their natural habitat.
• Schooling Behavior: Keeping them in a group enhances their natural behavior and reduces stress.

Feeding Habit:

• Omnivorous Diet: Blue Rainbowfish have an omnivorous diet. Offer a varied diet that includes high-quality flakes, pellets, and live or frozen foods.
• Plant Matter: They also appreciate vegetable-based foods such as spirulina flakes or blanched vegetables.

Water Parameters:

• Temperature: Maintain the water temperature between 73°F and 82°F (23°C to 28°C).
• pH Level: Aim for a neutral to slightly alkaline pH level between 7.0 and 8.0.
• Water Hardness: Provide moderate water hardness levels between 5 and 15 dGH.

Care:

• Tankmates: Choose peaceful and similarly sized tankmates that share their water parameter preferences.
• Observation: Monitor their interactions and behavior to ensure they are acclimating well to the tank.