sera Micron Nature is the colourant- and preservative-free breeding food for healthy feeding of fish and amphibian larvae as well as artemia nauplii in fresh and salt water. This powdered food contains both zooplankton (18% krill) and phytoplankton (51% spirulina) and consists of fine powder particles that float on water. In this way, sera Micron Nature optimally mimics natural plankton. It supports healthy growth, the immune system, as well as optimal development and colour. Since it can be used very well, the water is not unnecessarily polluted.complete feed for young ornamental fish and amphibians.