Description
The Pseudotropheus demasoni is a small but striking Mbuna cichlid endemic to the rocky shores of Lake Malawi. Renowned for its intense electric blue and black vertical stripes, this species is highly sought after by African cichlid enthusiasts. Despite its modest size, it exhibits bold territorial behaviour and requires a carefully managed environment to thrive in captivity.
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Features of Pseudotropheus demasoni
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Grows up to 8 cm in length
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Distinctive bright blue body with contrasting black vertical stripes
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Males and females share similar coloration, though males may be slightly larger
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Highly territorial and aggressive, especially in confined spaces
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Active and fast swimmers that require plenty of hiding spots
The Best Aquarium Size for Pseudotropheus demasoni
A minimum tank size of 120 litres is recommended for a small group. To reduce aggression, provide a tank with a long footprint and abundant rocky territories to allow individuals to establish separate zones.
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Tank Mate Compatibility for Pseudotropheus demasoni
Due to their aggressive nature, they should be kept with other robust Mbuna or similar-sized Lake Malawi cichlids that can handle their assertiveness. Suitable tank mates include:
Avoid housing with peaceful or slow-moving fish that may be bullied.
Diet for Pseudotropheus demasoni
Primarily herbivorous, this species benefits from a diet high in plant matter. Feed spirulina-based flakes or pellets, algae wafers, and occasional blanched vegetables such as zucchini or spinach. Avoid excessive protein-rich foods to prevent digestive issues.
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Aquarium Setup for Pseudotropheus demasoni
Aquarium Filtration
Strong biological and mechanical filtration is necessary to maintain optimal water quality for this active species.
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Aquarium Plants
Mbuna typically uproot plants, so use hardy species like Anubias or Java Fern attached to rocks if plants are desired.
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Aquarium Lighting
Moderate lighting helps highlight the vivid blue and black striping without stressing the fish.
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Aquarium Heating
Maintain water temperatures between 24°C and 28°C to mimic natural Lake Malawi conditions.
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Aquarium Substrate
Fine sand or smooth gravel supports natural digging and territorial behaviours.
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Aquarium Decorations
Create a rocky landscape with plenty of caves and crevices to establish territories and provide shelter. Use inert rocks such as limestone or lava rock to buffer pH and maintain the hard, alkaline water typical of Lake Malawi.
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