Wow that's crazy, BUT if it's that accurate and consistent, why use anything else alongside it?Definitely the best way, the tropic Marin never needs calibration, so you check your water, when it’s 1.0264 (yes it’s that precise) you can then use that water to check your other refractometer or whatever you choose to use on a daily basis.
Store some of that water in a glass bottle with an air tight lid and you have a ready made supply of reference fluid.