One of the most important water values in the marine aquarium is the salt content and can be defined through the salinity, the volume conductivity or the density. Measuring the density is the most common method of determining the salt content and is carried out using an aerometer (spindle). Because density measurement depends on the temperature (when marine water expands due to heating, its salt content distributes itself over a greater volume => the salt concentration is therefore reduced), the density is always specified together with the temperature. At a density of 1,0233 (25° C) marine water has a weight of 1.0233 kg. This corresponds to a salinity of 35 (one kg of marine water contains 35 g of salt) or a conductivity of 53.0 (mS/cm). DuplaMarin supplies high quality equipment for precise identification of the salt content.
