With Two Little Fishies AccuraSea you can measure your salinity precisely. AccuraSea seawater reference solution is the only calibration solution of its kind made from real seawater. It"™s pure natural sea water micron filtered and UV sterilized then adjusted with reverse osmosis water to the standard S = 35 or conductivity of 53 mS/cm at 25°C (77°F). Use it to accurately calibrate seawater refractometers and check the accuracy of swing-arm hydrometers . You may also want to use it as a reference for test kits used to measure the concentrations of various seawater components, since it is natural seawater with the correct and well-known concentrations of all dissolved salts. 250 ml bottles.
