Refractometer calibration solution

[Myka]

Buy a 100 gram digital scale for like $10. Make your own fluid. Done.

[Brunz]

....then you have to wonder of the purity of the solution you make based on the salt....

maybe I am just a paranoid lunatic

Actually I made up a test solution tonight using the most rudimentary equipment (vetinary syringe and a teaspoon) and well that came out at 35ppt so I'm just going to assume my refractometer is close enough and carry on. I did however begin to wonder because of this thread so thank you thread

[calo247]

thats why you use table salt, it is pure NaCl, and the density does not change, so if you weigh it you should be good to go