Refractometer w/ Calibration Fluid socks the fully customizable blue and

the fully customizable blue and white intensity features

the LED light and arm attachment will fit your tank perfectly

The titanium tubes are corrosion resistant which makes these virtually unbreakable for both saltwater and freshwater aquariums

In addition to keeping your water level constant

multicolored spines

Refractometer w/ Calibration Fluid socks the fully customizable blue andIf you have been using a hydrometer and have never tried a refractometer then you should really invest in one. They use much less water, and can easily be calibrated for accurate repeatable readings. For the most accurate readings you will want to calibrate the refractometer to the solution you will be reading, and that is why we always include a bottle of Aqua Craft Calibration Solution at 35ppt (1. 026sg) to keep your reef tanks salinity spot on.