Silver Tetra Care Guide - Aquarium Setup, Diet & Breeding

The Silver Tetra is a high-bodied, laterally compressed characin with a bright silvery sheen that catches the light as the fish moves. Its transparent fins and streamlined profile give it an understated but attractive appearance, while mature individuals can develop a particularly deep-bodied outline.

This is an active, social species that spends much of its time in the middle levels of the aquarium. In a group, Silver Tetras display more natural confidence and regularly weave through the water together, breaking formation and regrouping as they explore.

In the wild, they are associated with warm, slow-flowing waters and seasonally flooded habitats. These environments may contain submerged roots, leaf litter and dense marginal vegetation, with subdued light filtering through the surrounding forest.

Silver Tetras are peaceful community fish, although their energetic swimming style can make them less suitable for very timid species or fish with exceptionally long, delicate fins. Their reflective bodies and lively shoaling behaviour make them an engaging choice for a spacious South American community aquarium.

Silver Tetras are native to northern South America, including river systems in Guyana, Suriname, French Guiana and northern Brazil. They inhabit slow-moving streams, flooded areas and forest waterways with warm, soft to moderately hard freshwater.

A group of Silver Tetras should have at least a 120-litre aquarium, preferably measuring around 90 cm long by 40 cm wide, so there is sufficient uninterrupted swimming space. Use a soft sand or fine-gravel substrate, plant the sides and rear with hardy vegetation, and leave an open central area for shoaling. Driftwood, roots, leaf litter and subdued lighting can recreate the shaded character of their natural habitat, while gentle to moderate filtration provides clean, well-oxygenated water without creating excessive current.

Up to 8 cm (3.1 inches) in adult length. Females are often slightly larger and deeper-bodied than males, while males tend to remain a little slimmer.

Silver Tetras are omnivores and should receive a varied diet of quality small pellets or flakes supplemented with frozen or live foods such as brine shrimp, daphnia, bloodworm and mosquito larvae. Offering small portions once or twice daily helps maintain condition, and occasional vegetable-based foods can add useful variety.

Suitable tankmates include peaceful Corydoras, smaller to medium-sized peaceful tetras, rasboras, peaceful barbs, pencilfish, peaceful dwarf cichlids and compatible plecos. Avoid housing them with large predatory fish, highly aggressive species or very slow fish with long flowing fins, which may be stressed or nipped by their active behaviour.

Silver Tetras are egg-scattering free spawners. Condition a group with plentiful live or frozen foods, then place the fish in a separate, dimly lit breeding tank containing fine-leaved plants or spawning mops. The adults may eat the eggs, so remove them after spawning or protect the eggs with a mesh divider. The eggs usually hatch within one to two days, and the fry can be raised on infusoria or other microscopic first foods before moving on to newly hatched brine shrimp.

Females are generally fuller through the body, particularly when carrying eggs, and may grow slightly larger. Males are usually slimmer and can appear more streamlined, although the difference is subtle outside breeding condition.