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This peaceful Rainbowfish is a schooling fish that does best in a well planted aquarium with plenty of hiding places among the plants. A gravel substrate is ideal for these fish, and their colors will intensify against a darker colored gravel. Setting up the aquarium to provide a natural environment is essential for the health of these fish. Additionally, it’s important to provide the Rainbowfish with a suitable diet of high-quality flake and freeze-dried foods. Regular water changes are also necessary to maintain water quality.
An egg layer, the Threadfin Rainbow is known for its spawning activity on large clumps of moss. This species is highly successful in reproducing in an aquarium environment, with the eggs hatching in 7-8 days and the parents needing to be removed from the breeding tank prior to hatching. For successful rearing of the fry, small live food should be used to ensure proper nutrition. Additionally, the temperature of the breeding tank should be adjusted to the optimal level for the species to ensure healthy growth of the fry. Furthermore, regular water changes should be conducted to maintain a clean environment for the fry to thrive.
Although Threadfin Rainbows have large mouths, their throats tend to be narrow. This means that foods should not be too large. Iriatherina werneri should be fed an omnivore diet of small live foods and prepared foods.