Caution for anyone using a refractometer

[Reefer Rob]

Originally Posted by Doo

so - aside from the PINPOINT product - are there other products that can be picked up locally??

As far as I know Pinpoint is the only one. Thats what everyone who posts on RC is using. Alternatively you could find a buddy that uses a well calibrated salinity monitor on their tank, and use their tank water to check your refractometer.