Two little fishies AccuraSea Seawater Ref. Calibration Sol.

Use it to accurately calibrate seawater refractometers and check the accuracy of swing arm hydrometers. ...

Two little fishies AccuraSea Seawater Ref. Calibration Sol.

Do you think it is important to keep the salt content exactly at the right level?

We're with you. That's why we developed AccuraSea Seawater Reference Solution, the only calibration solution of its kind made from real seawater. It is 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 can also use it as a reference for test kits used to measure the concentrations of various seawater components, as it is natural seawater with the correct and known concentrations of all dissolved salts. Packed in 250 ml bottles.