More info
Datasheet
| Minimum Tank Size | 60 litres / 15.85 US gallons |
| Maximum Size | 2.0cm / 0.79inches |
| Temperature | 20°C / 68.00°F - 28°C / 82.40°F |
| Hardness | 1.01dgH / 18ppm - 5.04dgH / 90ppm |
| pH | 4.0-6.5 |
General Description
The Ruby Tetra (Axelrodia Riesei) is a diminutive fish species belonging to the Characidae family and the Characiformes order. It is distinguished by its red pigmentation, which can vary in intensity, and its less-elongated body compared to its congeners. The species was proposed as a new genus, Axelrodia, due to its unique dental characteristics.
Aquarium Setup
To maintain Ruby Tetras in captivity, a well-structured tank setup is recommended. This includes a sandy substrate, driftwood roots, and branches. Adding dried leaf litter not only enhances the natural feel of the environment but also promotes the growth of vital microbe colonies. Dim lighting, aquatic plants like Microsorum and Cryptocoryne spp., and floating vegetation are beneficial. Breeding necessitates acidic water conditions with low hardness, achievable through a reverse osmosis unit if needed.
Behaviour
Ruby Tetras are peaceful towards other species but are not ideal community fish due to their small size and specialized requirements. While they are naturally gregarious, they tend to shoal rather than school, with rival males establishing territories and engaging in occasional sparring. Maintaining a group of 8-10 individuals minimizes shyness and encourages the display of interesting behaviors.
Feeding and Diet
In their natural habitat, Ruby Tetras likely feed on tiny invertebrates and zooplankton. In captivity, they readily accept small dried foods but should also be provided with live or frozen options like Artemia nauplii, Daphnia, and grindal worms daily for optimal nutrition.
Reproduction & Dimorphism
Reproduction of Ruby Tetras can occur in a well-structured, mature aquarium without intervention, given soft, slightly acidic water conditions and fine-leaved plants for spawning. Adult males are slightly smaller and more intensely colored than females, with sexually mature females appearing rounder-bodied, especially when gravid.
Habitat and Distribution
The Ruby Tetra is native to the Upper Rio Meta basin in Colombia and is mostly found in blackwater environments within smaller, forested tributaries rather than larger river channels. This species' distribution is currently limited to the upper Meta, a tributary of the Rio Orinoco system.