sera marine reef salt Highest quality premium marine salt similar to nature The new sera marin reef salt is a highest quality premium marine salt similar to nature for splendid reefs. It is blended from single components and ensures pollutants can by all means be excluded. The constantly high quality reduces stress during water changes. Even the requirements of the most fastidious invertebrates, such as stony corals, are being fulfilled. Deficiencies are efficiently avoided. sera marin reef salt contains all required macro and trace elements, which in marine organisms have key functions in the skeleton growth of invertebrates and in the production of enzymes and color pigments. Easily and quickly soluble due to fine grain size and using pure single components.