Checkered Rainbowfish Care Sheet
Melanotaenia splendida inornata
 
Species Overview
The Checkered Rainbowfish is a peaceful and active Australian native known for its distinctive checkered patterning and iridescent colouration. This species thrives in well-maintained community aquariums and displays best when kept in groups.
 
Identification
Common Name: Checkered Rainbowfish
Scientific Name: Melanotaenia splendida inornata
Adult Size: Up to 12 cm
Lifespan: 5–8 years
Temperament: Peaceful, schooling
Water Parameters
Temperature: 22–28°C
pH: 6.5–8.0
Hardness: Soft to moderately hard
Ammonia / Nitrite: 0 ppm
Nitrate: <20 ppm
Tank Requirements
Minimum Tank Size: 120L
Aquascape:
Large open swimming areas
Planted edges with hardy or native plants
Dark substrate enhances colouration
Filtration: Moderate to strong flow
Lighting: Moderate–high
 
Diet
Checkered Rainbowfish are omnivorous and thrive on a varied diet.
Recommended Foods:
High-quality flakes and micro-pellets
Frozen foods: brine shrimp, bloodworms, daphnia
Live foods: baby brine shrimp, mosquito larvae
Occasional vegetable-based foods (spirulina, greens)
A diverse diet promotes maximum colour and vitality.
 
Behaviour
Schooling species—keep 6 or more
Active swimmers; occupy mid to upper water levels
Males display to each other, showing brighter colours
Generally peaceful toward tank mates
Suitable Tank Mates
Other rainbowfish
Tetras
Corydoras catfish
Peaceful Australian natives
Most non-aggressive community fish
Avoid:
Fin-nippers
Large predatory species
 
Breeding Information
Breeding Method: Egg scatterer
Spawning Sites: Fine-leaved plants or spawning mops
Hatching Time: 7–10 days
Raising Fry:
Feed infusoria or liquid fry foods initially
Transition to baby brine shrimp as fry grow
Adults may eat eggs, so a separate breeding setup is recommended.
 
General Care Notes
Maintain excellent water quality for long-term health
Weekly water changes of 25–40% recommended
Provide a secure lid—they can jump
Colour develops fully with age, diet, and stable conditions