We store this in a climate controlled environment to keep it fresh - Good for 6 months at room temperature, 1 year at 50°F. Best to keep refrigerated for longest shelf life. One and Only Live Nitrifying Bacteria prevents new tank syndrome by...

Lighted Refractometer uniquely design incorporates LED technology to illuminate the scale without the need of ambient light. It is designed for testing the concentration of salt water and brine and used for quality control in research and clinical...