Rainbowfish

Rainbowfish for Freshwater Aquariums

Rainbowfish are active swimmers and need plenty of open space.

Most species are peaceful and can work well in community aquariums with suitable tank mates.

A good Rainbowfish aquarium should include:

• Open swimming space
• Reliable filtration
• Stable water conditions
• Suitable group sizes
• Live plants or natural cover
• A varied diet

Keeping Rainbowfish in Groups

Most Rainbowfish are social fish and do best when kept in groups.

Keeping several together can encourage more natural behaviour and help the fish feel more secure.

Groups can also show stronger schooling behaviour and better colour.

The ideal group size will depend on the species and the size of your aquarium.

Australian Rainbowfish

Australia is home to many beautiful native Rainbowfish.

Popular Australian varieties may include:

• Crimson Spotted Rainbowfish
• Eastern Rainbowfish
• Murray River Rainbowfish
• Goyder River Rainbowfish
• Doublayi Rainbowfish
• Locality-specific varieties

Australian Rainbowfish look especially impressive in planted and naturally styled aquariums.

Popular Rainbowfish Varieties

Neon Rainbowfish

Neon Rainbowfish are smaller fish known for their bright blue body colour and contrasting fins.

They are active schooling fish and are well suited to medium-sized planted community tanks.

Threadfin Rainbowfish

Threadfin Rainbowfish are smaller, peaceful fish with long, delicate fins.

They are best kept with calm tank mates that will not compete too strongly for food.

Turquoise Rainbowfish

Turquoise Rainbowfish are larger, active fish with striking blue-green colour.

They need more swimming room than smaller Rainbowfish and are best suited to spacious aquariums.

What Size Tank Do Rainbowfish Need?

Tank size depends on the species.

Smaller Rainbowfish can suit medium-sized tanks, while larger species need much more swimming room.

Longer aquariums are usually a good choice because Rainbowfish spend much of their time swimming through open water.

When choosing a tank, consider:

• Adult fish size
• Group size
• Tank mates
• Swimming space
• Filtration

Always plan for the adult size of the fish, not just the size when purchased.

Water Conditions for Rainbowfish

Rainbowfish prefer clean and stable freshwater conditions.

Temperature, pH and hardness needs vary between species, so check the requirements of the fish you are buying.

Many commonly kept Rainbowfish are fairly adaptable when water conditions remain stable and changes are made slowly.

What Do Rainbowfish Eat?

Most Rainbowfish are omnivores and enjoy a varied diet.

Suitable foods can include:

• Tropical flakes
• Small pellets
• Native fish food
• Frozen foods
• Small live foods
• Insect-based foods
• Spirulina and vegetable-based foods

A varied diet can help support healthy growth, good condition and strong colour.

Rainbowfish & Live Plants

Rainbowfish are excellent fish for planted aquariums.

Live plants provide cover and help create a more natural environment.

Plants can also provide shaded areas and spawning sites.

Keep the middle or front of the aquarium open so the fish still have plenty of room to swim.

Aquascaping for Rainbowfish

A Rainbowfish aquascape should balance planted areas with open swimming space.

Useful materials include:

• Live aquarium plants
• Driftwood
• Smooth rocks
• Sand or natural substrate

Taller plants work well along the sides and back of the tank.

This creates shelter without blocking the main swimming area.

Rainbowfish Tank Mates

Many Rainbowfish are suitable for peaceful community aquariums.

Possible tank mates include:

• Corydoras
• Bristlenose Catfish
• Peaceful Tetras
• Gouramis
• Compatible Rainbowfish
• Other peaceful Australian native fish

Avoid aggressive species or very small fish that may be intimidated by larger, active Rainbowfish.

Filtration & Water Quality

Good filtration is important for Rainbowfish.

These active fish also benefit from clean, well-oxygenated water.

Regular water changes and filter maintenance help keep water conditions stable.

Choose a filter that provides enough circulation for the aquarium without creating excessive flow.

Rainbowfish Colour

Rainbowfish often become more colourful as they mature.

Adult males may show stronger colour than juveniles or females.

Colour can also be affected by:

• Diet
• Water quality
• Aquarium lighting
• Stress
• Genetics
• Fish maturity

Young Rainbowfish may therefore look very different from fully grown adults.

Buy Rainbowfish Online in Australia

Aquaholics Online stocks a changing range of freshwater Rainbowfish for Australian fishkeepers.

Species, sizes and locality varieties may change throughout the year because we are dealing with live livestock.

Browse the current range above to see which Rainbowfish are available now.

Frequently Asked Questions

Are Rainbowfish good community fish?

Yes. Many Rainbowfish are peaceful and work well in community aquariums with fish of a similar size and temperament.

Do Rainbowfish need to be kept in groups?

Yes. Most Rainbowfish are social fish and generally do best when kept with others of their own kind.

How big do Rainbowfish grow?

Adult size varies by species. Smaller Rainbowfish remain fairly compact, while larger species need much more swimming space.

What do Rainbowfish eat?

Most Rainbowfish are omnivores and do well on quality flakes or pellets with suitable frozen, live and vegetable-based foods.

Are Rainbowfish Australian native fish?

Many popular Rainbowfish are native to Australia. Rainbowfish also occur naturally in New Guinea and nearby regions.

Can Rainbowfish live with Corydoras?

Yes. Rainbowfish and Corydoras can often live together when the tank size and water conditions suit both species.

Are Rainbowfish good for planted aquariums?

Yes. Rainbowfish look excellent in planted tanks as long as enough open swimming space is left.

Do Rainbowfish need a heater?

Many species prefer tropical or subtropical temperatures. Check the requirements of the individual Rainbowfish species before choosing a heater setting.

Why are my Rainbowfish not very colourful?

Juveniles and females may naturally be less colourful than mature males. Diet, water quality, lighting and stress can also affect colour.

Do you ship Rainbowfish Australia-wide?

Aquaholics Online ships live fish to eligible Australian locations, subject to livestock availability, regional restrictions and biosecurity requirements.