Seachem Digital Spoon Scale Supplement Dosing ToolWhen precision matters, the Seachem Digital Spoon Scale is the perfect companion tool for the serious aquarist. Accurate and easy to use, it will ensure precise dosing of any chemical or supplement up to 300 grams in 0. 1 increments. The LCD display will display results in either grams or ounces and can be switched at the push of a button. It is corrosion resistant and colored to resist stains. It runs on 2 AAA batteries (included) with an easy access