Calibrating Refractometer

Remember that there are two different types of refractometers you can buy.
One is the salt water refractometer but the other is seawater refractometer.
That link to Randy Holmes-Farley's article gives the information I would trust over any other reefer's personal experiences.

 

Me too. I've seen it for myself. It's just not cost-effective for me to calibrate with solutions. I would have to charge for it to pay for the solutions. Again, my main issue is consistency Vs. a specific number so if I get their refract close, I'm happy.