sera marin reef salt 20kg The new sera marin reef salt is a high-end marine salt similar to nature, blended from separate components. This ensures it does not contain pollutants of any kind. Users will achieve reproducible results due to the constant quality. Even very sensitive organisms do not react with stress when carrying out water changes with sera marin reef salt. The requirements of even the most demanding invertebrates in saltwater aquariums, such as stony corals, are fulfilled. This efficiently avoids deficiency syndromes. · sera marin reef salt contains all necessary macro and trace elements that fulfill key functions in the skeleton formation of invertebrates as wells as in the build-up of enzymes and color pigments. Readily and very quickly soluble due to fine grain size and the utilization of pure single components.