Buenos Aires Tetra Gold (Hemigrammus caudovittatus) — 4,5-5cm

Overview

The Buenos Aires Tetra Gold (Hemigrammus caudovittatus) is a hardy, active schooling tetra for sale UK with striking golden coloration that enhances the classic Buenos Aires Tetra's robust nature and lively personality. Native to the Río de la Plata basin in Argentina, Uruguay, Paraguay, and southern Brazil, this attractive gold variety displays beautiful warm yellow-gold body tones while retaining the species' characteristic red tail flash and energetic schooling behaviour. One of the hardiest tetras available, this species tolerates a wide temperature range and adapts well to varied water conditions, making it ideal for both beginners and experienced fishkeepers. With proper schooling and appropriate tankmate selection, this vibrant gold variety creates dynamic movement and warm color in community aquariums.

Appearance

Hemigrammus caudovittatus Gold variety presents a robust, laterally compressed body adorned with beautiful golden-yellow coloration that replaces the silvery tones of the standard variety. The species retains its characteristic red to orange coloration on the tail fin, creating an attractive warm color combination. A dark horizontal line may be visible running from behind the gill cover toward the tail, though this can be subtle in the gold variety. Fins are generally clear to slightly tinted. The overall body shape suggests strength and activity—this is a robust, energetic tetra built for active swimming. Sexual dimorphism is subtle; males are typically slightly smaller and more streamlined than fuller-bodied females. Under optimal conditions and diet, the golden coloration intensifies, creating spectacular visual impact when schools move through the aquarium.

Natural Habitat

The base species Hemigrammus caudovittatus inhabits the Río de la Plata basin across Argentina, Uruguay, Paraguay, and southern Brazil, including both subtropical and temperate water bodies. This adaptable species occurs in rivers, streams, and floodplain areas with varied vegetation and substrate types. The water ranges from soft to moderately hard, neutral to slightly acidic, with a notable temperature range reflecting the subtropical to temperate climate—water temperatures vary seasonally from cool to warm. The gold variety is a selectively bred aquarium strain. In nature, these tetras form schools and feed opportunistically on small invertebrates, insect larvae, plant matter, and detritus. The hardy nature reflects adaptation to variable environmental conditions in natural range.

Aquarium Setup

A minimum 80-litre aquarium provides adequate space for a school of 6-8 individuals with room for additional community species. Create a planted community setup using fine sand or gravel substrate, driftwood, rocks for structure, and moderate planting around the perimeter. Maintain substantial open swimming space through the center where these active schools can display natural behavior. Lighting can range from subdued to bright—this adaptable species tolerates various light levels. Filtration should provide moderate water movement—this species appreciates some current. A secure lid is essential, as Buenos Aires Tetras are accomplished jumpers, particularly when startled. Note: This species has a reputation for nibbling soft-leaved plants, so choose tough species like Anubias, Java Fern, Vallisneria, or artificial plants if lush planted scapes are desired. Hardy, fast-growing plants fare better than delicate species.

Water Parameters

Highly adaptable to varied water conditions, reflecting subtropical origins. Tolerates pH of 6.0-7.5 and soft to moderately hard water (up to 18 dGH). Notable for wide temperature tolerance: 18-27°C, making it suitable for unheated tanks in temperate climates or tropical community aquariums. This hardiness is unusual among tetras. Use a reliable heater if maintaining tropical temperatures. Water quality should be good: ammonia and nitrite zero, nitrates below 40 ppm—this robust species tolerates somewhat higher nitrates than delicate tetras, though regular 25-30% weekly water changes maintain optimal health. Use dechlorinated water. While highly adaptable, maintain stability—avoid sudden extreme parameter shifts. The gold variety has the same hardiness as standard forms. This adaptability makes it ideal for beginners or situations where precise parameter control is challenging.

Feeding

Offer a varied omnivorous diet including quality flake or micro-pellets as a staple, supplemented with frozen or live foods such as daphnia, brine shrimp, and bloodworms, plus occasional vegetable matter like blanched spinach or spirulina-based foods. This species is an enthusiastic, unfussy feeder that readily accepts virtually all prepared foods. Feed two to three times daily in moderate portions. Include some plant-based foods to satisfy grazing instincts and potentially reduce plant-nibbling behavior in planted tanks. Variety maintains optimal health and color intensity—the golden coloration benefits from carotenoid-rich foods. Well-fed fish display more confident behavior and better schooling. This species' hearty appetite and active nature mean they rarely refuse food and compete well at feeding time. Avoid overfeeding, which degrades water quality.

Behaviour

Buenos Aires Tetra Gold displays active, energetic schooling behaviour with generally peaceful temperament toward appropriately sized tankmates. In proper schools, they create dynamic movement patterns through aquariums, constantly exploring and swimming actively. Can show fin-nipping tendencies toward slow-moving or long-finned fish, particularly if kept in too-small groups or cramped conditions—schooling reduces this behavior. Active throughout the day at all water levels but particularly mid to upper regions. In well-stocked tanks with adequate group size and active tankmates, much potential nippy behavior is directed within the school. The gold variety retains all the hardy, active characteristics of the standard form. Some plant-nibbling behavior may occur with soft-leaved plants. Overall, a robust, confident species that adds lively energy to community aquariums when housed appropriately.

Tank Mates

Compatible tank mates include other active peaceful community fish such as similar-sized tetras, danios, rasboras, peaceful barbs, and Corydoras catfish. Active peaceful livebearers and peaceful loaches also work well. Avoid housing with slow-moving fish with long fins (angels, bettas, fancy guppies) that may become fin-nipping targets, very small fry or shrimp, aggressive cichlids, large predatory fish, and fin-nipping species kept in cramped conditions. The key is selecting active, robust tankmates that can hold their own in a lively community. Best kept with fish of similar activity level and temperament. In well-balanced communities with proper Buenos Aires Tetra school size (8+), this species coexists well and adds vibrant gold color and energetic movement. Particularly suitable for cooler water community tanks where many tropical species would struggle.

Breeding

Scatter-spawning egg layer that can be bred in dedicated breeding setups. To encourage breeding, set up a separate breeding tank (40-60 litres) with soft, slightly acidic water (pH 6.5-7.0), subdued lighting, fine-leaved plants like Java moss or spawning mops for egg deposition, and gentle sponge filtration. Condition adults with high-quality live and frozen foods until females become visibly rounded with eggs. Introduce a well-conditioned pair or small group in the evening. Spawning typically occurs at dawn, with eggs scattered among plants. Remove adults immediately after spawning, as they may eat eggs and fry with enthusiasm. Eggs hatch in 24-48 hours depending on temperature. Fry become free-swimming 3-5 days after hatching and require microscopic foods like infusoria or liquid fry food initially, graduating to newly hatched brine shrimp within one week. Maintain excellent water quality during fry-rearing. Fry grow relatively quickly compared to some tetras. The gold coloration develops as fry mature.

Why Buy from Tropical Fish Co

Tropical Fish Co is your trusted UK source for quality South American tetras, including attractive color varieties like the Buenos Aires Tetra Gold. Every fish undergoes comprehensive quarantine and health screening to ensure you receive vibrant, healthy specimens showing excellent golden coloration. Our knowledgeable team provides expert guidance on hardy species care, community stocking, and aquarium setup to ensure long-term success for beginners and experienced fishkeepers alike. We offer secure next-day delivery throughout the UK with professional insulated packaging and seasonal temperature control. Our commitment includes healthy, active fish displaying excellent color, backed by our live arrival guarantee and ongoing support. Whether establishing your first community aquarium or adding vibrant color to an existing setup, trust Tropical Fish Co for exceptional quality, expert advice, and customer service that stands behind every fish. Bring warm golden color and lively energy into your aquarium with confidence.