Danio are a really good choice of freshwater fish for beginners to keep, even in Nano tanks. They like to be kept in groups and are very easy to care for. In the right conditions, the danio can live anything from 2-4 years and can cope well with changes to temperature and water conditions. Danios can be fed either fish flakes or pellets and can even have live or frozen foods occasionally. Danios can happily live alongside several other fish species, but certainly feel at their most comfortable when they are in a shoal of other danios.