Rasbora / Aquarium Zone · Ballina
Trigonostigma heteromorpha
A peaceful community fish. Grows to about 5 cm and suits a tank of 150 litres or more.
The fish, up close
The Purple Harlequin Rasbora, scientifically known as Trigonostigma heteromorpha, is a striking and popular freshwater fish species among aquarium enthusiasts. They display a beautiful purple sheen on their bodies, highlighted by black triangular patches behind their gills. Their fins are adorned with delicate red and black detailing, adding to their overall elegance. These peaceful and sociable fish thrive in a well-planted aquarium with subdued lighting and a dark substrate to bring out their vibrant colours. They prefer a school environment, so it's recommended to keep them in groups of at least six individuals to ensure their comfort and reduce stress.
Care guide
Use these notes to shape a setup around the fish, then speak with our team about the tank you have in mind.
Plan your setupBehaviour
These rasboras are known for their peaceful nature and are ideal for community tanks with other non-aggressive species. They are active swimmers that enjoy exploring their surroundings, especially when kept in a school. Purple Harlequin Rasboras are known to be shy initially but will become more outgoing and vibrant in the presence of their own kind.
Tank planning
Maintaining stable water parameters is crucial for the well-being of Purple Harlequin Rasboras. They prefer slightly acidic to neutral water with a temperature range of 22-26°C. Regular water changes and efficient filtration are essential to keep the aquarium environment pristine. Provide ample hiding spots among plants and driftwood to create a natural habitat that mimics their native environment.
Practical details
Questions
For a specific fish, current stock or a tank setup question, speak with the Aquarium Zone team before travelling.
Contact the storeAquarium Zone regularly helps customers find freshwater fish in Ballina and across the Northern Rivers. Stock changes week to week, so contact the store before visiting if you are looking for Purple Harlequin Rasbora.
Yes. Bring your tank size, current fish list, setup photos, and any water test results so the team can help with compatibility, stocking, and care advice.
Purple Harlequin Rasbora is listed with this tank recommendation: A minimum tank size of 60 litres is recommended for a small school of Purple Harlequin Rasboras. However, larger tanks around 100-150 litres or more are preferable if keeping a larger group or in a community setup with other fish species. Ask in-store for advice based on your exact setup and tank mates.
Yes. Aquarium Zone serves aquarium hobbyists from Ballina, Lennox Head, Alstonville, Wollongbar, Bangalow, Byron Bay, Lismore, Evans Head, Mullumbimby, Casino and the wider Northern Rivers.
Aquarium Zone / Ballina
Looking for Purple Harlequin Rasbora? Contact us to confirm current availability and discuss whether it suits your aquarium before making the trip.
18 Southern Cross Drive
