Black Darter Tetra

Black Darter Tetra (Poecilocharax weitzmani) is a rare and fascinating nano fish prized for its jet-black body, subtle iridescence, and unique darting behaviour. Native to blackwater environments, this species is highly sought after by dedicated aquarists who appreciate understated beauty and natural behaviour. Peaceful and best kept in groups, the Black Darter Tetra is an excellent choice for specialised, well-planted aquariums. Shop aquarium fish online delivered with confidence with our livestock guarantee. Features of Black Darter Tetra • Native habitat: blackwater streams and flooded forest areas of South America• Maximum size: approximately 2.5–3 cm in length• Lifespan: 3–5 years with proper aquarium care• Temperament: peaceful and shy; thrives in groups• Colouration: deep black body with subtle metallic highlights under soft lighting• Behaviour: lower- to mid-level swimmer; quick, darting movements with periods of hovering The Best Aquarium Size for Black Darter Tetra A minimum aquarium size of 45 litres is recommended for a small group. Larger aquariums provide greater stability and allow natural schooling behaviour to develop. These fish are most comfortable in calm, dimly lit setups with dense cover. After an Aquarium for your fish? Browse our Aquarium Tank Selection here. Tank Mate Compatibility for Black Darter Tetra Black Darter Tetras are best housed with other small, peaceful species that enjoy similar water conditions. Suitable tank mates include:• Small rasboras• Ember tetras• Pencilfish• Dwarf Corydoras Avoid large or boisterous fish, as well as aggressive species that may intimidate them. Diet for Black Darter Tetra A micro-predatory species, Black Darter Tetras require small, high-quality foods. Offer micro pellets, crushed flakes, and frozen or live foods such as baby brine shrimp, cyclops, and daphnia. Frequent small feedings help maintain health and colour. Check out our best selling aquarium fish foods. Aquarium Setup for Black Darter Tetra Aquarium FiltrationGentle filtration is essential, as these fish prefer slow-moving water. Sponge filters or low-flow filters are ideal while maintaining excellent water quality. Shop aquarium filtration and spare parts here. Aquarium PlantsLive plants are strongly recommended. Dense planting with fine-leaf plants, mosses, and floating plants provides security and encourages natural behaviour. Interested in Live Plants for your aquariums? Click here to see more live aquarium plants Aquarium LightingLow lighting is preferred to replicate blackwater conditions and enhance natural coloration. Adjustable LED lighting with dimming capability works best. We recommend Zetlight LED aquarium lighting that allows for easy adjustability in a full range of spectrums.   Aquarium HeatingMaintain stable temperatures between 24–28°C using a reliable heater and thermometer. Aquarium SubstrateFine sand or dark-coloured substrate enhances their colour and mimics natural habitats. A variety of Substrates are available at Coburg Aquarium. Aquarium DecorationsUse driftwood, leaf litter, and natural décor to create shaded areas and visual barriers. This setup helps reduce stress and brings out confident behaviour. The Black Darter Tetra is a subtle, elegant, and rewarding species that shines in thoughtfully designed, peaceful aquariums focused on natural aesthetics and gentle conditions.