Hemigrammus beckfordi, more commonly known as the Golden Pencilfish or Beckford’s Pencilfish, is a slender, strikingly coloured freshwater species native to slow-moving streams and creeks of South America, particularly in Guyana and Brazil. Known for their golden body and horizontal black stripe, these fish add both activity and visual interest to a peaceful, planted community aquarium. Their calm demeanor and small size make them an excellent choice for aquarists seeking a harmonious and biodiverse setup.
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Grows up to 5 cm in length
Characteristic golden body with a bold black lateral stripe
Fins may show reddish or orange hues, especially in males
Peaceful, non-aggressive temperament
Best kept in small shoals of 6 or more
Lifespan ranges from 3 to 5 years under optimal conditions
A tank of at least 60 litres is suitable for a small group of Hemigrammus beckfordi. Their active nature requires horizontal swimming space, and additional volume improves stability and allows for a more diverse aquascape. A 90-litre aquarium or larger is ideal when including tank mates.
Suitable aquariums to consider include:
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Ember Tetra
Pygmy Corydoras
Hatchetfish
Honey Gourami
Chili Rasbora
An omnivorous species, Beckford’s Pencilfish thrives on a varied diet. Offer micro pellets, high-quality flakes, and a mix of frozen or live foods such as mosquito larvae, brine shrimp, and micro worms. Frequent, small feedings help mimic their natural grazing behaviour. Plant-based supplements can also be included for dietary diversity.
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Aquarium Filtration
A sponge or low-flow internal filter is recommended. These fish prefer slow-moving waters, so avoid strong currents.
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Aquarium Plants
Dense vegetation with fine-leaved species like Cabomba, Water Wisteria, and Java moss provides cover and encourages natural shoaling behaviour.
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Aquarium Lighting
Soft to moderate lighting is best. Dimmer light settings, or the use of floating plants, reduce stress and highlight the golden and black contrast.
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Aquarium Heating
Maintain water temperatures between 24–28 °C using a consistent heater. Sudden fluctuations should be avoided.
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Aquarium Substrate
Fine sand or smooth gravel in dark tones enhances the colours of the fish and replicates their natural biotope.
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Aquarium Decorations
Use natural driftwood, leaf litter, and rock caves to provide hiding places and visual barriers. All decorations should be smooth and chemically inert.
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