Electric Blue Johannii

The Electric Blue Johannii, scientifically known as Pseudotropheus johannii, belongs to the Cichlids - African family group. Adults reach a maximum size of approximately 10 cm and have a fusiform body shape with a moderate growth rate. Classified as aggressive, this species primarily occupies the mid-level and bottom zones of the aquarium and produces a high level of biological waste.

To thrive, the Electric Blue Johannii requires a freshwater only aquarium with a minimum volume of 150 litres and a tank length of at least 90 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 7.8–8.6 and a general hardness of 10–25 dGH. A moderate water flow is preferred.

Due to its specialist needs, the Electric Blue Johannii is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 3 varieties: Juvenile / Unsexed, Male (Electric Blue), and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.

When setting up an aquarium for the Electric Blue Johannii, a moderate water flow best suits their natural preferences. Because this species occupies the mid-level and bottom zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour and an established tank with natural algae growth, as they depend on it as a primary food source. Keepers should note that expect substrate disturbance, so lightweight décor should be secured and live planted layouts may be difficult to maintain, as this species tends to uproot or consume vegetation.

Classified as aggressive, the Electric Blue Johannii is a social species that requires the company of its own kind to thrive. When choosing tankmates, conspecific aggression can be intense, especially in smaller tanks, territorial behaviour may cause issues if hiding spots or floor space are limited, and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the mid-level and bottom zones can help reduce competition and territorial overlap.

Electric Blue Johannii is best for a fishkeeper who expects a species with attitude and plans the tank around that behavior and can provide a keeper who can commit to a proper group of at least 4. It makes the most sense for a hobbyist who will actually build around its needs, especially sand.

The most common mistake is treating Electric Blue Johannii like any other community fish and skipping the soft sand it needs to forage safely. Another frequent problem is underestimating its social needs. A token pair or trio often behaves very differently from a real group.