Salinity Calibration Fluid 35ppt, Refractometer Fish Tank Aquarium Salt Meter

Item Description: 3.6ml Vial of 35ppt Salinity Refractometer Calibration Fluid (Conductivity Standard) - 3.8ml THIS IS THE BEST WAY TO CALIBRATE YOUR SALINITY REFRACTOMETERS!  NO MATTER WHICH UNIT YOU HAVE OR WHERE IT CAME FROM, THIS FLUID WILL HELP YOU GET THE MOST OUT OF YOUR SALINITY REFRACTOMETER! Specifications: Salt Water Specific Gravity:  1.0264 SG Salinity in PPT: 35PPT Refractive Index @ 25'C: 1.3394 RI @ 25°C Appearance and Color: Clear Liquid Package:  Comes in an amber glass vial with a plastic applicator rod in the cap for easy dispensing THIS FLUID ENABLES YOUR SALINITY REFRACTOMETER TO BE AS ACCURATE AS POSSIBLE!     COMMON QUESTIONS: Why do I need this fluid?  -  Simply put, it will calibrate your Salinity Refractometer in the middle of the usual salt water marine environment range.  Calibrating it to 0PPT/1.000SG with distilled water, r/o water, etc., make that point the most accurate, while the further points are gradually less accurate.  The theory behind this f