Usage for hash tag: PA203X

...My second digital refractometer was the Misco Palm Abbe. #PA203. They now have a newer model specifically targeting aquariums, the #PA203X. It measures out to 0.0001, with a +- of .0005. This means I get VERY repeatable readings that hover between 1.0263 and 1.0268 when I have my salinity...