Calibration of Hydrometer

[aquafreak]

Discussed this with some Marine Aquarium geeks and they said mine was off by .002. Anyone else with this problem? Is it a big deal?

 

[saltwatersmac]

I just checked my Deep Six Hydrometer against a refractometer at LFS. Mine was also low by .003. I just plan on keeping my tank around 1.021 and that should actually be about 1.024