African Cichlid / Aquarium Zone · Ballina
Pseudotropheus demasoni
Aggressive, and best with robust tankmates of a similar size. Grows to about 8 cm and suits a tank of 200 litres or more.
The fish, up close
Pseudotropheus demasoni, commonly known as Demansoni, is a strikingly beautiful freshwater fish species native to Lake Malawi in Africa. They are characterized by their vibrant blue colouration with black vertical bars running along their bodies. These fish have a slender and elongated body shape, with males typically displaying brighter colours than females. Demansoni are known for their territorial behaviour and can be aggressive towards other fish, especially males of the same species.
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
Demansoni are known to be aggressive and territorial fish, especially towards their own kind. They establish hierarchies within the tank and can be quite dominant. It is recommended to keep them in larger groups to help disperse aggression and minimise bullying. They are active swimmers and will often be seen darting around the tank, especially during feeding times.
Tank planning
Maintaining a stable water parameters is crucial for the health of Demansoni. They prefer water temperatures between 24-26°C and a pH level of around 7.5-8.5. Provide plenty of hiding spots and caves in the aquarium to help reduce aggression and provide territories for each fish. Regular water changes and good filtration are essential to keep the water quality high.
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 Demansoni.
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.
Demansoni is listed with this tank recommendation: A tank size of at least 200 litres is recommended for a small group of Demansoni. The tank should have plenty of rocks and caves to mimic their natural habitat in Lake Malawi. Ensuring there is enough space for each fish to establish their territory is essential to reduce aggression. 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 Demansoni? Contact us to confirm current availability and discuss whether it suits your aquarium before making the trip.
18 Southern Cross Drive
