sondaar
New member
HEy all this may be a dumb question but I have a Vertex Refractometer and the directions say to calibrate with fresh water. I bought a bottle of Pinpoint Salinity solution to check it with. When calibrated to 0 with fresh water the solution reads 38ppt. The solution is suppose to read 35ppt. Is it better to use the solution for calibration or stick with the directions and use fresh water?
Thanks!
Thanks!