<a href=showthread.php?s=&postid=9856729#post9856729 target=_blank>Originally posted</a> by kb0vhy
What do you use to Calibrate? RO Water? ..............
Most salinity refractometers in the hobby are designed and manufactured to measure salt water and not sea water, seawater has a different refraction index than salt water. If you use distilled or RO/DI water to calibrate the zero then when you read the salinity at natural sea water level (1.0264) you will not be actually reading salinity of seawater but that of salt water which will read a salinity lower than what is needed.<a href=showthread.php?s=&postid=9857834#post9857834 target=_blank>Originally posted</a> by AngeloM3
How about the ones that state "No calibration needed"? I was told for those to use distilled or RO water.
One cup+1 Teaspoon of Morton salt. In other words a bit more than one cup.<a href=showthread.php?s=&postid=9870670#post9870670 target=_blank>Originally posted</a> by AngeloM3
I'm a little confused by the directions how to make the correct sollution....
It says to add 1/4 cup Mortons Salt and 1 tsp of salt etc....
The 1 tsp of salt... is that table salt or reef salt?
<a href=showthread.php?s=&postid=9870709#post9870709 target=_blank>Originally posted</a> by jdieck
One cup+1 Teaspoon of Morton salt. In other words a bit more than one cup.