Description Refracomteres are an essential tool for any marine hobbyist who wishes to check their salinity accurately and easily. This tool will outlast a hydrometer and will help you ensure that your marine critters are happy and healthy! Includes Portable Refractometer (with automatic temperature compensation) Screwdriver for calibrating Pipette Carrying Case Manual Range 1.000 - 1.070 Directions Ensure refractometer is properly calibrated Open cover plate and place 2-3 drops of saltwater on prism. Close viewing pane and hold it up to a light source Take reading where blue and white fields converge Clean off prism with soft cloth and store in dry environement Pisces recommends Two Little Fishies AccuraSea in order to calibrate your refractometer. Calibration with RO water will not be as accurate
