Can i use this product to calibrate my refractometer?

[xdestry]

Hey guys I was wondering if I could use this product to calibrate my refractometer. Thanks!

http://www.bulkreefsupply.com/neptune-systems-conductivity-calibration-solution.html

[Randy Holmes-Farley]

Without knowing what chemicals they used to make the 53 mS/cm solution, one cannot know what its refractive index would be and whether it is suitable, so I'd look for a different product, such as the Pinpoint standard. :)